Home / 715,566.50-987,440.07-393,276.87

Finding the Fourth Proportional to 715,566.50, 987,440.07 and 393,276.87

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Solution

The fourth proportional to 715,566.50, 987,440.07 and 393,276.87 is: 542,699.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,566.50 : 987,440.07 = 393,276.87 : x
  2. Step 2: Convert to fraction form
    715,566.50/987,440.07 = 393,276.87/x
  3. Step 3: Cross multiply
    715,566.50x = 987,440.07 × 393,276.87
  4. Step 4: Simplify right side
    715,566.50x = 388,337,339,304.79
  5. Step 5: Solve for x
    x = 388,337,339,304.79/715,566.50
  6. Step 6: Final answer
    x = 542,699.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.