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Finding the Fourth Proportional to 518,490.56, 715,516.92 and 280,026.56

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Solution

The fourth proportional to 518,490.56, 715,516.92 and 280,026.56 is: 386,436.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,490.56 : 715,516.92 = 280,026.56 : x
  2. Step 2: Convert to fraction form
    518,490.56/715,516.92 = 280,026.56/x
  3. Step 3: Cross multiply
    518,490.56x = 715,516.92 × 280,026.56
  4. Step 4: Simplify right side
    518,490.56x = 200,363,741,729.40
  5. Step 5: Solve for x
    x = 200,363,741,729.40/518,490.56
  6. Step 6: Final answer
    x = 386,436.62

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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.