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Finding the Fourth Proportional to 518,820.48, 715,971.84 and 280,356.48

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Solution

The fourth proportional to 518,820.48, 715,971.84 and 280,356.48 is: 386,891.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,820.48 : 715,971.84 = 280,356.48 : x
  2. Step 2: Convert to fraction form
    518,820.48/715,971.84 = 280,356.48/x
  3. Step 3: Cross multiply
    518,820.48x = 715,971.84 × 280,356.48
  4. Step 4: Simplify right side
    518,820.48x = 200,727,344,841.52
  5. Step 5: Solve for x
    x = 200,727,344,841.52/518,820.48
  6. Step 6: Final answer
    x = 386,891.71

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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.