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Finding the Fourth Proportional to 865,876.52, 1,194,806.11 and 478,639.77

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Solution

The fourth proportional to 865,876.52, 1,194,806.11 and 478,639.77 is: 660,465.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,876.52 : 1,194,806.11 = 478,639.77 : x
  2. Step 2: Convert to fraction form
    865,876.52/1,194,806.11 = 478,639.77/x
  3. Step 3: Cross multiply
    865,876.52x = 1,194,806.11 × 478,639.77
  4. Step 4: Simplify right side
    865,876.52x = 571,881,721,685.00
  5. Step 5: Solve for x
    x = 571,881,721,685.00/865,876.52
  6. Step 6: Final answer
    x = 660,465.68

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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.