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Finding the Fourth Proportional to 661,425.67, 912,766.21 and 359,618.95

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Solution

The fourth proportional to 661,425.67, 912,766.21 and 359,618.95 is: 496,273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,425.67 : 912,766.21 = 359,618.95 : x
  2. Step 2: Convert to fraction form
    661,425.67/912,766.21 = 359,618.95/x
  3. Step 3: Cross multiply
    661,425.67x = 912,766.21 × 359,618.95
  4. Step 4: Simplify right side
    661,425.67x = 328,248,026,035.68
  5. Step 5: Solve for x
    x = 328,248,026,035.68/661,425.67
  6. Step 6: Final answer
    x = 496,273.49

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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.