Home / 831,619.80-1,247,429.70-768,634.20

Finding the Fourth Proportional to 831,619.80, 1,247,429.70 and 768,634.20

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Solution

The fourth proportional to 831,619.80, 1,247,429.70 and 768,634.20 is: 1,152,951.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,619.80 : 1,247,429.70 = 768,634.20 : x
  2. Step 2: Convert to fraction form
    831,619.80/1,247,429.70 = 768,634.20/x
  3. Step 3: Cross multiply
    831,619.80x = 1,247,429.70 × 768,634.20
  4. Step 4: Simplify right side
    831,619.80x = 958,817,129,515.74
  5. Step 5: Solve for x
    x = 958,817,129,515.74/831,619.80
  6. Step 6: Final answer
    x = 1,152,951.30

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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.