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Finding the Fourth Proportional to 372.47, 555.90 and 330.86

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Solution

The fourth proportional to 372.47, 555.90 and 330.86 is: 493.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.47 : 555.90 = 330.86 : x
  2. Step 2: Convert to fraction form
    372.47/555.90 = 330.86/x
  3. Step 3: Cross multiply
    372.47x = 555.90 × 330.86
  4. Step 4: Simplify right side
    372.47x = 183,922.29
  5. Step 5: Solve for x
    x = 183,922.29/372.47
  6. Step 6: Final answer
    x = 493.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.