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Finding the Fourth Proportional to 391,376.80, 587,259.60 and 154,727.20

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Solution

The fourth proportional to 391,376.80, 587,259.60 and 154,727.20 is: 232,167.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,376.80 : 587,259.60 = 154,727.20 : x
  2. Step 2: Convert to fraction form
    391,376.80/587,259.60 = 154,727.20/x
  3. Step 3: Cross multiply
    391,376.80x = 587,259.60 × 154,727.20
  4. Step 4: Simplify right side
    391,376.80x = 90,865,033,581.12
  5. Step 5: Solve for x
    x = 90,865,033,581.12/391,376.80
  6. Step 6: Final answer
    x = 232,167.65

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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.