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Finding the Fourth Proportional to 372.82, 515.02 and 307.30

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Solution

The fourth proportional to 372.82, 515.02 and 307.30 is: 424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.82 : 515.02 = 307.30 : x
  2. Step 2: Convert to fraction form
    372.82/515.02 = 307.30/x
  3. Step 3: Cross multiply
    372.82x = 515.02 × 307.30
  4. Step 4: Simplify right side
    372.82x = 158,262.30
  5. Step 5: Solve for x
    x = 158,262.30/372.82
  6. Step 6: Final answer
    x = 424.51

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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.