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Finding the Fourth Proportional to 372.49, 513.65 and 279.24

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Solution

The fourth proportional to 372.49, 513.65 and 279.24 is: 385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.49 : 513.65 = 279.24 : x
  2. Step 2: Convert to fraction form
    372.49/513.65 = 279.24/x
  3. Step 3: Cross multiply
    372.49x = 513.65 × 279.24
  4. Step 4: Simplify right side
    372.49x = 143,431.63
  5. Step 5: Solve for x
    x = 143,431.63/372.49
  6. Step 6: Final answer
    x = 385.06

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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.