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Finding the Fourth Proportional to 391,247.44, 586,762.73 and 138,494.66

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Solution

The fourth proportional to 391,247.44, 586,762.73 and 138,494.66 is: 207,703.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,247.44 : 586,762.73 = 138,494.66 : x
  2. Step 2: Convert to fraction form
    391,247.44/586,762.73 = 138,494.66/x
  3. Step 3: Cross multiply
    391,247.44x = 586,762.73 × 138,494.66
  4. Step 4: Simplify right side
    391,247.44x = 81,263,505,764.66
  5. Step 5: Solve for x
    x = 81,263,505,764.66/391,247.44
  6. Step 6: Final answer
    x = 207,703.61

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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.