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Finding the Fourth Proportional to 518,181.47, 715,071.55 and 288,726.90

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Solution

The fourth proportional to 518,181.47, 715,071.55 and 288,726.90 is: 398,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,181.47 : 715,071.55 = 288,726.90 : x
  2. Step 2: Convert to fraction form
    518,181.47/715,071.55 = 288,726.90/x
  3. Step 3: Cross multiply
    518,181.47x = 715,071.55 × 288,726.90
  4. Step 4: Simplify right side
    518,181.47x = 206,460,391,909.70
  5. Step 5: Solve for x
    x = 206,460,391,909.70/518,181.47
  6. Step 6: Final answer
    x = 398,432.60

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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.