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Finding the Fourth Proportional to 391,628.88, 587,499.38 and 148,559.32

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Solution

The fourth proportional to 391,628.88, 587,499.38 and 148,559.32 is: 222,860.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,628.88 : 587,499.38 = 148,559.32 : x
  2. Step 2: Convert to fraction form
    391,628.88/587,499.38 = 148,559.32/x
  3. Step 3: Cross multiply
    391,628.88x = 587,499.38 × 148,559.32
  4. Step 4: Simplify right side
    391,628.88x = 87,278,508,393.22
  5. Step 5: Solve for x
    x = 87,278,508,393.22/391,628.88
  6. Step 6: Final answer
    x = 222,860.25

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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.