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Finding the Fourth Proportional to 1,278,819.29, 1,764,770.76 and 705,859.61

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Solution

The fourth proportional to 1,278,819.29, 1,764,770.76 and 705,859.61 is: 974,086.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,819.29 : 1,764,770.76 = 705,859.61 : x
  2. Step 2: Convert to fraction form
    1,278,819.29/1,764,770.76 = 705,859.61/x
  3. Step 3: Cross multiply
    1,278,819.29x = 1,764,770.76 × 705,859.61
  4. Step 4: Simplify right side
    1,278,819.29x = 1,245,680,391,569.15
  5. Step 5: Solve for x
    x = 1,245,680,391,569.15/1,278,819.29
  6. Step 6: Final answer
    x = 974,086.34

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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.