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Finding the Fourth Proportional to 485,508.64, 728,262.96 and 319,257.76

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Solution

The fourth proportional to 485,508.64, 728,262.96 and 319,257.76 is: 478,886.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,508.64 : 728,262.96 = 319,257.76 : x
  2. Step 2: Convert to fraction form
    485,508.64/728,262.96 = 319,257.76/x
  3. Step 3: Cross multiply
    485,508.64x = 728,262.96 × 319,257.76
  4. Step 4: Simplify right side
    485,508.64x = 232,503,601,300.57
  5. Step 5: Solve for x
    x = 232,503,601,300.57/485,508.64
  6. Step 6: Final answer
    x = 478,886.64

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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.