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Finding the Fourth Proportional to 1,306.71, 1,961.46 and 889.02

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Solution

The fourth proportional to 1,306.71, 1,961.46 and 889.02 is: 1,334.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.71 : 1,961.46 = 889.02 : x
  2. Step 2: Convert to fraction form
    1,306.71/1,961.46 = 889.02/x
  3. Step 3: Cross multiply
    1,306.71x = 1,961.46 × 889.02
  4. Step 4: Simplify right side
    1,306.71x = 1,743,777.17
  5. Step 5: Solve for x
    x = 1,743,777.17/1,306.71
  6. Step 6: Final answer
    x = 1,334.48

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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.