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Finding the Fourth Proportional to 399,854.57, 599,819.45 and 147,139.89

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Solution

The fourth proportional to 399,854.57, 599,819.45 and 147,139.89 is: 220,723.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,854.57 : 599,819.45 = 147,139.89 : x
  2. Step 2: Convert to fraction form
    399,854.57/599,819.45 = 147,139.89/x
  3. Step 3: Cross multiply
    399,854.57x = 599,819.45 × 147,139.89
  4. Step 4: Simplify right side
    399,854.57x = 88,257,364,158.06
  5. Step 5: Solve for x
    x = 88,257,364,158.06/399,854.57
  6. Step 6: Final answer
    x = 220,723.66

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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.