Home / 638,831,531.70-958,247,297.55-409,249,019.70

Finding the Fourth Proportional to 638,831,531.70, 958,247,297.55 and 409,249,019.70

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Solution

The fourth proportional to 638,831,531.70, 958,247,297.55 and 409,249,019.70 is: 613,873,529.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,831,531.70 : 958,247,297.55 = 409,249,019.70 : x
  2. Step 2: Convert to fraction form
    638,831,531.70/958,247,297.55 = 409,249,019.70/x
  3. Step 3: Cross multiply
    638,831,531.70x = 958,247,297.55 × 409,249,019.70
  4. Step 4: Simplify right side
    638,831,531.70x = 392,161,767,152,511,680
  5. Step 5: Solve for x
    x = 392,161,767,152,511,680/638,831,531.70
  6. Step 6: Final answer
    x = 613,873,529.55

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Double scale
Find fourth proportional to 638,831,532.70, 958,247,299.05 and 409,249,020.70
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.