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Finding the Fourth Proportional to 959.78, 1,439.67 and 301.66

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Solution

The fourth proportional to 959.78, 1,439.67 and 301.66 is: 452.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.78 : 1,439.67 = 301.66 : x
  2. Step 2: Convert to fraction form
    959.78/1,439.67 = 301.66/x
  3. Step 3: Cross multiply
    959.78x = 1,439.67 × 301.66
  4. Step 4: Simplify right side
    959.78x = 434,288.38
  5. Step 5: Solve for x
    x = 434,288.38/959.78
  6. Step 6: Final answer
    x = 452.49

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Double scale
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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.