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Finding the Fourth Proportional to 330.11, 495.62 and 291.84

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Solution

The fourth proportional to 330.11, 495.62 and 291.84 is: 438.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.11 : 495.62 = 291.84 : x
  2. Step 2: Convert to fraction form
    330.11/495.62 = 291.84/x
  3. Step 3: Cross multiply
    330.11x = 495.62 × 291.84
  4. Step 4: Simplify right side
    330.11x = 144,639.52
  5. Step 5: Solve for x
    x = 144,639.52/330.11
  6. Step 6: Final answer
    x = 438.16

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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.