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Finding the Fourth Proportional to 485,319.68, 727,486.72 and 185,723.52

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Solution

The fourth proportional to 485,319.68, 727,486.72 and 185,723.52 is: 278,396.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,319.68 : 727,486.72 = 185,723.52 : x
  2. Step 2: Convert to fraction form
    485,319.68/727,486.72 = 185,723.52/x
  3. Step 3: Cross multiply
    485,319.68x = 727,486.72 × 185,723.52
  4. Step 4: Simplify right side
    485,319.68x = 135,111,394,391.65
  5. Step 5: Solve for x
    x = 135,111,394,391.65/485,319.68
  6. Step 6: Final answer
    x = 278,396.69

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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.