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Finding the Fourth Proportional to 399,672.46, 551,632.17 and 387,026.74

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Solution

The fourth proportional to 399,672.46, 551,632.17 and 387,026.74 is: 534,178.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,672.46 : 551,632.17 = 387,026.74 : x
  2. Step 2: Convert to fraction form
    399,672.46/551,632.17 = 387,026.74/x
  3. Step 3: Cross multiply
    399,672.46x = 551,632.17 × 387,026.74
  4. Step 4: Simplify right side
    399,672.46x = 213,496,400,434.23
  5. Step 5: Solve for x
    x = 213,496,400,434.23/399,672.46
  6. Step 6: Final answer
    x = 534,178.41

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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.