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Finding the Fourth Proportional to 372.39, 513.45 and 288.36

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Solution

The fourth proportional to 372.39, 513.45 and 288.36 is: 397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.39 : 513.45 = 288.36 : x
  2. Step 2: Convert to fraction form
    372.39/513.45 = 288.36/x
  3. Step 3: Cross multiply
    372.39x = 513.45 × 288.36
  4. Step 4: Simplify right side
    372.39x = 148,058.44
  5. Step 5: Solve for x
    x = 148,058.44/372.39
  6. Step 6: Final answer
    x = 397.59

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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.