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Finding the Fourth Proportional to 372.44, 513.78 and 307.46

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Solution

The fourth proportional to 372.44, 513.78 and 307.46 is: 424.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.44 : 513.78 = 307.46 : x
  2. Step 2: Convert to fraction form
    372.44/513.78 = 307.46/x
  3. Step 3: Cross multiply
    372.44x = 513.78 × 307.46
  4. Step 4: Simplify right side
    372.44x = 157,966.80
  5. Step 5: Solve for x
    x = 157,966.80/372.44
  6. Step 6: Final answer
    x = 424.14

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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.