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Finding the Fourth Proportional to 322,729.60, 485,260.80 and 315,731.20

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Solution

The fourth proportional to 322,729.60, 485,260.80 and 315,731.20 is: 474,737.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,729.60 : 485,260.80 = 315,731.20 : x
  2. Step 2: Convert to fraction form
    322,729.60/485,260.80 = 315,731.20/x
  3. Step 3: Cross multiply
    322,729.60x = 485,260.80 × 315,731.20
  4. Step 4: Simplify right side
    322,729.60x = 153,211,974,696.96
  5. Step 5: Solve for x
    x = 153,211,974,696.96/322,729.60
  6. Step 6: Final answer
    x = 474,737.91

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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.