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Finding the Fourth Proportional to 861,253.92, 1,188,741.42 and 667,278

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Solution

The fourth proportional to 861,253.92, 1,188,741.42 and 667,278 is: 921,007.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,253.92 : 1,188,741.42 = 667,278 : x
  2. Step 2: Convert to fraction form
    861,253.92/1,188,741.42 = 667,278/x
  3. Step 3: Cross multiply
    861,253.92x = 1,188,741.42 × 667,278
  4. Step 4: Simplify right side
    861,253.92x = 793,220,997,254.76
  5. Step 5: Solve for x
    x = 793,220,997,254.76/861,253.92
  6. Step 6: Final answer
    x = 921,007.13

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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.