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Finding the Fourth Proportional to 1,306.53, 1,803.70 and 889.11

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Solution

The fourth proportional to 1,306.53, 1,803.70 and 889.11 is: 1,227.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.53 : 1,803.70 = 889.11 : x
  2. Step 2: Convert to fraction form
    1,306.53/1,803.70 = 889.11/x
  3. Step 3: Cross multiply
    1,306.53x = 1,803.70 × 889.11
  4. Step 4: Simplify right side
    1,306.53x = 1,603,687.71
  5. Step 5: Solve for x
    x = 1,603,687.71/1,306.53
  6. Step 6: Final answer
    x = 1,227.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.