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Finding the Fourth Proportional to 386,963.70, 580,445.55 and 245,246.10

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Solution

The fourth proportional to 386,963.70, 580,445.55 and 245,246.10 is: 367,869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,963.70 : 580,445.55 = 245,246.10 : x
  2. Step 2: Convert to fraction form
    386,963.70/580,445.55 = 245,246.10/x
  3. Step 3: Cross multiply
    386,963.70x = 580,445.55 × 245,246.10
  4. Step 4: Simplify right side
    386,963.70x = 142,352,007,399.86
  5. Step 5: Solve for x
    x = 142,352,007,399.86/386,963.70
  6. Step 6: Final answer
    x = 367,869.15

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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.