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Finding the Fourth Proportional to 657,287.80, 985,542.90 and 342,359.80

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Solution

The fourth proportional to 657,287.80, 985,542.90 and 342,359.80 is: 513,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,287.80 : 985,542.90 = 342,359.80 : x
  2. Step 2: Convert to fraction form
    657,287.80/985,542.90 = 342,359.80/x
  3. Step 3: Cross multiply
    657,287.80x = 985,542.90 × 342,359.80
  4. Step 4: Simplify right side
    657,287.80x = 337,410,270,135.42
  5. Step 5: Solve for x
    x = 337,410,270,135.42/657,287.80
  6. Step 6: Final answer
    x = 513,337.19

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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.