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Finding the Fourth Proportional to 250,728.10, 375,738.51 and 138,458.86

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Solution

The fourth proportional to 250,728.10, 375,738.51 and 138,458.86 is: 207,493.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,728.10 : 375,738.51 = 138,458.86 : x
  2. Step 2: Convert to fraction form
    250,728.10/375,738.51 = 138,458.86/x
  3. Step 3: Cross multiply
    250,728.10x = 375,738.51 × 138,458.86
  4. Step 4: Simplify right side
    250,728.10x = 52,024,325,752.70
  5. Step 5: Solve for x
    x = 52,024,325,752.70/250,728.10
  6. Step 6: Final answer
    x = 207,493.00

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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.