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Finding the Fourth Proportional to 916.06, 1,373.44 and 330.78

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Solution

The fourth proportional to 916.06, 1,373.44 and 330.78 is: 495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.06 : 1,373.44 = 330.78 : x
  2. Step 2: Convert to fraction form
    916.06/1,373.44 = 330.78/x
  3. Step 3: Cross multiply
    916.06x = 1,373.44 × 330.78
  4. Step 4: Simplify right side
    916.06x = 454,306.48
  5. Step 5: Solve for x
    x = 454,306.48/916.06
  6. Step 6: Final answer
    x = 495.94

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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.