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Finding the Fourth Proportional to 485,504.64, 728,256.96 and 319,253.76

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Solution

The fourth proportional to 485,504.64, 728,256.96 and 319,253.76 is: 478,880.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,504.64 : 728,256.96 = 319,253.76 : x
  2. Step 2: Convert to fraction form
    485,504.64/728,256.96 = 319,253.76/x
  3. Step 3: Cross multiply
    485,504.64x = 728,256.96 × 319,253.76
  4. Step 4: Simplify right side
    485,504.64x = 232,498,772,726.17
  5. Step 5: Solve for x
    x = 232,498,772,726.17/485,504.64
  6. Step 6: Final answer
    x = 478,880.64

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Similar ratio
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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.