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Finding the Fourth Proportional to 485,718.53, 728,787.17 and 260,815.95

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Solution

The fourth proportional to 485,718.53, 728,787.17 and 260,815.95 is: 391,336.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,718.53 : 728,787.17 = 260,815.95 : x
  2. Step 2: Convert to fraction form
    485,718.53/728,787.17 = 260,815.95/x
  3. Step 3: Cross multiply
    485,718.53x = 728,787.17 × 260,815.95
  4. Step 4: Simplify right side
    485,718.53x = 190,079,318,743.40
  5. Step 5: Solve for x
    x = 190,079,318,743.40/485,718.53
  6. Step 6: Final answer
    x = 391,336.36

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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.