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Finding the Fourth Proportional to 878.01, 1,316.97 and 330.15

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Solution

The fourth proportional to 878.01, 1,316.97 and 330.15 is: 495.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.01 : 1,316.97 = 330.15 : x
  2. Step 2: Convert to fraction form
    878.01/1,316.97 = 330.15/x
  3. Step 3: Cross multiply
    878.01x = 1,316.97 × 330.15
  4. Step 4: Simplify right side
    878.01x = 434,797.65
  5. Step 5: Solve for x
    x = 434,797.65/878.01
  6. Step 6: Final answer
    x = 495.21

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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.