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Finding the Fourth Proportional to 391,163.55, 587,123.73 and 188,901.42

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Solution

The fourth proportional to 391,163.55, 587,123.73 and 188,901.42 is: 283,534.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,163.55 : 587,123.73 = 188,901.42 : x
  2. Step 2: Convert to fraction form
    391,163.55/587,123.73 = 188,901.42/x
  3. Step 3: Cross multiply
    391,163.55x = 587,123.73 × 188,901.42
  4. Step 4: Simplify right side
    391,163.55x = 110,908,506,312.70
  5. Step 5: Solve for x
    x = 110,908,506,312.70/391,163.55
  6. Step 6: Final answer
    x = 283,534.87

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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.