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Finding the Fourth Proportional to 518,502.64, 715,555.68 and 289,059.88

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Solution

The fourth proportional to 518,502.64, 715,555.68 and 289,059.88 is: 398,914.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,502.64 : 715,555.68 = 289,059.88 : x
  2. Step 2: Convert to fraction form
    518,502.64/715,555.68 = 289,059.88/x
  3. Step 3: Cross multiply
    518,502.64x = 715,555.68 × 289,059.88
  4. Step 4: Simplify right side
    518,502.64x = 206,838,438,994.12
  5. Step 5: Solve for x
    x = 206,838,438,994.12/518,502.64
  6. Step 6: Final answer
    x = 398,914.92

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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.