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Finding the Fourth Proportional to 715,566.24, 987,507.48 and 393,300.96

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Solution

The fourth proportional to 715,566.24, 987,507.48 and 393,300.96 is: 542,769.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,566.24 : 987,507.48 = 393,300.96 : x
  2. Step 2: Convert to fraction form
    715,566.24/987,507.48 = 393,300.96/x
  3. Step 3: Cross multiply
    715,566.24x = 987,507.48 × 393,300.96
  4. Step 4: Simplify right side
    715,566.24x = 388,387,639,891.18
  5. Step 5: Solve for x
    x = 388,387,639,891.18/715,566.24
  6. Step 6: Final answer
    x = 542,769.65

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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.