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Finding the Fourth Proportional to 372.72, 515.50 and 294.80

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Solution

The fourth proportional to 372.72, 515.50 and 294.80 is: 407.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.72 : 515.50 = 294.80 : x
  2. Step 2: Convert to fraction form
    372.72/515.50 = 294.80/x
  3. Step 3: Cross multiply
    372.72x = 515.50 × 294.80
  4. Step 4: Simplify right side
    372.72x = 151,971.61
  5. Step 5: Solve for x
    x = 151,971.61/372.72
  6. Step 6: Final answer
    x = 407.74

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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.