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Finding the Fourth Proportional to 408,833.10, 613,276.99 and 138,957.30

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Solution

The fourth proportional to 408,833.10, 613,276.99 and 138,957.30 is: 208,445.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,833.10 : 613,276.99 = 138,957.30 : x
  2. Step 2: Convert to fraction form
    408,833.10/613,276.99 = 138,957.30/x
  3. Step 3: Cross multiply
    408,833.10x = 613,276.99 × 138,957.30
  4. Step 4: Simplify right side
    408,833.10x = 85,219,314,335.13
  5. Step 5: Solve for x
    x = 85,219,314,335.13/408,833.10
  6. Step 6: Final answer
    x = 208,445.24

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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.