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Finding the Fourth Proportional to 330.18, 494.40 and 291.26

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Solution

The fourth proportional to 330.18, 494.40 and 291.26 is: 436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.18 : 494.40 = 291.26 : x
  2. Step 2: Convert to fraction form
    330.18/494.40 = 291.26/x
  3. Step 3: Cross multiply
    330.18x = 494.40 × 291.26
  4. Step 4: Simplify right side
    330.18x = 143,996.47
  5. Step 5: Solve for x
    x = 143,996.47/330.18
  6. Step 6: Final answer
    x = 436.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.