Home / 747,513.90-1,121,270.85-642,537.90

Finding the Fourth Proportional to 747,513.90, 1,121,270.85 and 642,537.90

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Solution

The fourth proportional to 747,513.90, 1,121,270.85 and 642,537.90 is: 963,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,513.90 : 1,121,270.85 = 642,537.90 : x
  2. Step 2: Convert to fraction form
    747,513.90/1,121,270.85 = 642,537.90/x
  3. Step 3: Cross multiply
    747,513.90x = 1,121,270.85 × 642,537.90
  4. Step 4: Simplify right side
    747,513.90x = 720,459,017,290.22
  5. Step 5: Solve for x
    x = 720,459,017,290.22/747,513.90
  6. Step 6: Final answer
    x = 963,806.85

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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.