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Finding the Fourth Proportional to 372.91, 515.14 and 339.66

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Solution

The fourth proportional to 372.91, 515.14 and 339.66 is: 469.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.91 : 515.14 = 339.66 : x
  2. Step 2: Convert to fraction form
    372.91/515.14 = 339.66/x
  3. Step 3: Cross multiply
    372.91x = 515.14 × 339.66
  4. Step 4: Simplify right side
    372.91x = 174,972.45
  5. Step 5: Solve for x
    x = 174,972.45/372.91
  6. Step 6: Final answer
    x = 469.21

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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.