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Finding the Fourth Proportional to 391,898.46, 587,896.29 and 111,437.58

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Solution

The fourth proportional to 391,898.46, 587,896.29 and 111,437.58 is: 167,170.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,898.46 : 587,896.29 = 111,437.58 : x
  2. Step 2: Convert to fraction form
    391,898.46/587,896.29 = 111,437.58/x
  3. Step 3: Cross multiply
    391,898.46x = 587,896.29 × 111,437.58
  4. Step 4: Simplify right side
    391,898.46x = 65,513,739,848.58
  5. Step 5: Solve for x
    x = 65,513,739,848.58/391,898.46
  6. Step 6: Final answer
    x = 167,170.19

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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.