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Finding the Fourth Proportional to 661,121.86, 991,101.17 and 262,042.76

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Solution

The fourth proportional to 661,121.86, 991,101.17 and 262,042.76 is: 392,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,121.86 : 991,101.17 = 262,042.76 : x
  2. Step 2: Convert to fraction form
    661,121.86/991,101.17 = 262,042.76/x
  3. Step 3: Cross multiply
    661,121.86x = 991,101.17 × 262,042.76
  4. Step 4: Simplify right side
    661,121.86x = 259,710,881,070.52
  5. Step 5: Solve for x
    x = 259,710,881,070.52/661,121.86
  6. Step 6: Final answer
    x = 392,833.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.