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Finding the Fourth Proportional to 391,388.95, 586,898.36 and 151,615.15

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Solution

The fourth proportional to 391,388.95, 586,898.36 and 151,615.15 is: 227,351.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,388.95 : 586,898.36 = 151,615.15 : x
  2. Step 2: Convert to fraction form
    391,388.95/586,898.36 = 151,615.15/x
  3. Step 3: Cross multiply
    391,388.95x = 586,898.36 × 151,615.15
  4. Step 4: Simplify right side
    391,388.95x = 88,982,682,886.15
  5. Step 5: Solve for x
    x = 88,982,682,886.15/391,388.95
  6. Step 6: Final answer
    x = 227,351.04

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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.