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Finding the Fourth Proportional to 1,306.97, 1,803.62 and 717.54

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Solution

The fourth proportional to 1,306.97, 1,803.62 and 717.54 is: 990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.97 : 1,803.62 = 717.54 : x
  2. Step 2: Convert to fraction form
    1,306.97/1,803.62 = 717.54/x
  3. Step 3: Cross multiply
    1,306.97x = 1,803.62 × 717.54
  4. Step 4: Simplify right side
    1,306.97x = 1,294,170.63
  5. Step 5: Solve for x
    x = 1,294,170.63/1,306.97
  6. Step 6: Final answer
    x = 990.21

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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.