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Finding the Fourth Proportional to 421.13, 580.77 and 374.96

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Solution

The fourth proportional to 421.13, 580.77 and 374.96 is: 517.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.13 : 580.77 = 374.96 : x
  2. Step 2: Convert to fraction form
    421.13/580.77 = 374.96/x
  3. Step 3: Cross multiply
    421.13x = 580.77 × 374.96
  4. Step 4: Simplify right side
    421.13x = 217,766.97
  5. Step 5: Solve for x
    x = 217,766.97/421.13
  6. Step 6: Final answer
    x = 517.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.