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Finding the Fourth Proportional to 391,640.89, 587,341.74 and 270,837.95

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Solution

The fourth proportional to 391,640.89, 587,341.74 and 270,837.95 is: 406,174.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,640.89 : 587,341.74 = 270,837.95 : x
  2. Step 2: Convert to fraction form
    391,640.89/587,341.74 = 270,837.95/x
  3. Step 3: Cross multiply
    391,640.89x = 587,341.74 × 270,837.95
  4. Step 4: Simplify right side
    391,640.89x = 159,074,432,811.03
  5. Step 5: Solve for x
    x = 159,074,432,811.03/391,640.89
  6. Step 6: Final answer
    x = 406,174.22

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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.