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Finding the Fourth Proportional to 657,992.32, 907,974.72 and 386,031.76

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Solution

The fourth proportional to 657,992.32, 907,974.72 and 386,031.76 is: 532,691.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,992.32 : 907,974.72 = 386,031.76 : x
  2. Step 2: Convert to fraction form
    657,992.32/907,974.72 = 386,031.76/x
  3. Step 3: Cross multiply
    657,992.32x = 907,974.72 × 386,031.76
  4. Step 4: Simplify right side
    657,992.32x = 350,507,079,197.11
  5. Step 5: Solve for x
    x = 350,507,079,197.11/657,992.32
  6. Step 6: Final answer
    x = 532,691.75

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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.