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Finding the Fourth Proportional to 372.29, 513.20 and 283.79

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Solution

The fourth proportional to 372.29, 513.20 and 283.79 is: 391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.29 : 513.20 = 283.79 : x
  2. Step 2: Convert to fraction form
    372.29/513.20 = 283.79/x
  3. Step 3: Cross multiply
    372.29x = 513.20 × 283.79
  4. Step 4: Simplify right side
    372.29x = 145,643.02
  5. Step 5: Solve for x
    x = 145,643.02/372.29
  6. Step 6: Final answer
    x = 391.21

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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.