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Finding the Fourth Proportional to 667,316.71, 920,897.92 and 361,393.59

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Solution

The fourth proportional to 667,316.71, 920,897.92 and 361,393.59 is: 498,723.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,316.71 : 920,897.92 = 361,393.59 : x
  2. Step 2: Convert to fraction form
    667,316.71/920,897.92 = 361,393.59/x
  3. Step 3: Cross multiply
    667,316.71x = 920,897.92 × 361,393.59
  4. Step 4: Simplify right side
    667,316.71x = 332,806,605,332.33
  5. Step 5: Solve for x
    x = 332,806,605,332.33/667,316.71
  6. Step 6: Final answer
    x = 498,723.62

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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.