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Finding the Fourth Proportional to 723,405.47, 998,207.78 and 396,632.49

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Solution

The fourth proportional to 723,405.47, 998,207.78 and 396,632.49 is: 547,302.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,405.47 : 998,207.78 = 396,632.49 : x
  2. Step 2: Convert to fraction form
    723,405.47/998,207.78 = 396,632.49/x
  3. Step 3: Cross multiply
    723,405.47x = 998,207.78 × 396,632.49
  4. Step 4: Simplify right side
    723,405.47x = 395,921,635,335.61
  5. Step 5: Solve for x
    x = 395,921,635,335.61/723,405.47
  6. Step 6: Final answer
    x = 547,302.52

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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.