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Finding the Fourth Proportional to 518,354.48, 715,332.50 and 288,926.31

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Solution

The fourth proportional to 518,354.48, 715,332.50 and 288,926.31 is: 398,720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,354.48 : 715,332.50 = 288,926.31 : x
  2. Step 2: Convert to fraction form
    518,354.48/715,332.50 = 288,926.31/x
  3. Step 3: Cross multiply
    518,354.48x = 715,332.50 × 288,926.31
  4. Step 4: Simplify right side
    518,354.48x = 206,678,382,866.12
  5. Step 5: Solve for x
    x = 206,678,382,866.12/518,354.48
  6. Step 6: Final answer
    x = 398,720.16

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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.