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Finding the Fourth Proportional to 859,755.12, 1,287,951.06 and 708,169.83

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Solution

The fourth proportional to 859,755.12, 1,287,951.06 and 708,169.83 is: 1,060,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,755.12 : 1,287,951.06 = 708,169.83 : x
  2. Step 2: Convert to fraction form
    859,755.12/1,287,951.06 = 708,169.83/x
  3. Step 3: Cross multiply
    859,755.12x = 1,287,951.06 × 708,169.83
  4. Step 4: Simplify right side
    859,755.12x = 912,088,083,208.52
  5. Step 5: Solve for x
    x = 912,088,083,208.52/859,755.12
  6. Step 6: Final answer
    x = 1,060,869.62

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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.