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Finding the Fourth Proportional to 391,315.20, 586,895.82 and 125,003.94

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Solution

The fourth proportional to 391,315.20, 586,895.82 and 125,003.94 is: 187,481.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,315.20 : 586,895.82 = 125,003.94 : x
  2. Step 2: Convert to fraction form
    391,315.20/586,895.82 = 125,003.94/x
  3. Step 3: Cross multiply
    391,315.20x = 586,895.82 × 125,003.94
  4. Step 4: Simplify right side
    391,315.20x = 73,364,289,869.53
  5. Step 5: Solve for x
    x = 73,364,289,869.53/391,315.20
  6. Step 6: Final answer
    x = 187,481.32

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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.