Home / 638,831,431.20-958,247,146.80-409,248,919.20

Finding the Fourth Proportional to 638,831,431.20, 958,247,146.80 and 409,248,919.20

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Solution

The fourth proportional to 638,831,431.20, 958,247,146.80 and 409,248,919.20 is: 613,873,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,831,431.20 : 958,247,146.80 = 409,248,919.20 : x
  2. Step 2: Convert to fraction form
    638,831,431.20/958,247,146.80 = 409,248,919.20/x
  3. Step 3: Cross multiply
    638,831,431.20x = 958,247,146.80 × 409,248,919.20
  4. Step 4: Simplify right side
    638,831,431.20x = 392,161,609,154,383,680
  5. Step 5: Solve for x
    x = 392,161,609,154,383,680/638,831,431.20
  6. Step 6: Final answer
    x = 613,873,378.80

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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.