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Finding the Fourth Proportional to 485,309.32, 727,965.78 and 148,348.67

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Solution

The fourth proportional to 485,309.32, 727,965.78 and 148,348.67 is: 222,523.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,309.32 : 727,965.78 = 148,348.67 : x
  2. Step 2: Convert to fraction form
    485,309.32/727,965.78 = 148,348.67/x
  3. Step 3: Cross multiply
    485,309.32x = 727,965.78 × 148,348.67
  4. Step 4: Simplify right side
    485,309.32x = 107,992,751,072.38
  5. Step 5: Solve for x
    x = 107,992,751,072.38/485,309.32
  6. Step 6: Final answer
    x = 222,523.55

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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.