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Finding the Fourth Proportional to 330.56, 455.56 and 237.16

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Solution

The fourth proportional to 330.56, 455.56 and 237.16 is: 326.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.56 : 455.56 = 237.16 : x
  2. Step 2: Convert to fraction form
    330.56/455.56 = 237.16/x
  3. Step 3: Cross multiply
    330.56x = 455.56 × 237.16
  4. Step 4: Simplify right side
    330.56x = 108,040.61
  5. Step 5: Solve for x
    x = 108,040.61/330.56
  6. Step 6: Final answer
    x = 326.84

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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.