Home / 782,107.20-1,171,411.20-642,139.20

Finding the Fourth Proportional to 782,107.20, 1,171,411.20 and 642,139.20

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Solution

The fourth proportional to 782,107.20, 1,171,411.20 and 642,139.20 is: 961,772.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,107.20 : 1,171,411.20 = 642,139.20 : x
  2. Step 2: Convert to fraction form
    782,107.20/1,171,411.20 = 642,139.20/x
  3. Step 3: Cross multiply
    782,107.20x = 1,171,411.20 × 642,139.20
  4. Step 4: Simplify right side
    782,107.20x = 752,209,050,839.04
  5. Step 5: Solve for x
    x = 752,209,050,839.04/782,107.20
  6. Step 6: Final answer
    x = 961,772.31

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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.