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Finding the Fourth Proportional to 399,753.72, 551,399.76 and 256,286.52

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Solution

The fourth proportional to 399,753.72, 551,399.76 and 256,286.52 is: 353,508.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,753.72 : 551,399.76 = 256,286.52 : x
  2. Step 2: Convert to fraction form
    399,753.72/551,399.76 = 256,286.52/x
  3. Step 3: Cross multiply
    399,753.72x = 551,399.76 × 256,286.52
  4. Step 4: Simplify right side
    399,753.72x = 141,316,325,619.24
  5. Step 5: Solve for x
    x = 141,316,325,619.24/399,753.72
  6. Step 6: Final answer
    x = 353,508.47

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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.