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Finding the Fourth Proportional to 781.29, 1,171.58 and 294.00

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Solution

The fourth proportional to 781.29, 1,171.58 and 294.00 is: 440.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    781.29 : 1,171.58 = 294.00 : x
  2. Step 2: Convert to fraction form
    781.29/1,171.58 = 294.00/x
  3. Step 3: Cross multiply
    781.29x = 1,171.58 × 294.00
  4. Step 4: Simplify right side
    781.29x = 344,438.66
  5. Step 5: Solve for x
    x = 344,438.66/781.29
  6. Step 6: Final answer
    x = 440.86

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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.