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Finding the Fourth Proportional to 391,715.80, 587,768.10 and 223,365.40

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Solution

The fourth proportional to 391,715.80, 587,768.10 and 223,365.40 is: 335,158.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,715.80 : 587,768.10 = 223,365.40 : x
  2. Step 2: Convert to fraction form
    391,715.80/587,768.10 = 223,365.40/x
  3. Step 3: Cross multiply
    391,715.80x = 587,768.10 × 223,365.40
  4. Step 4: Simplify right side
    391,715.80x = 131,287,056,763.74
  5. Step 5: Solve for x
    x = 131,287,056,763.74/391,715.80
  6. Step 6: Final answer
    x = 335,158.95

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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.