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Finding the Fourth Proportional to 1,306.98, 1,803.69 and 717.53

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Solution

The fourth proportional to 1,306.98, 1,803.69 and 717.53 is: 990.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.98 : 1,803.69 = 717.53 : x
  2. Step 2: Convert to fraction form
    1,306.98/1,803.69 = 717.53/x
  3. Step 3: Cross multiply
    1,306.98x = 1,803.69 × 717.53
  4. Step 4: Simplify right side
    1,306.98x = 1,294,192.67
  5. Step 5: Solve for x
    x = 1,294,192.67/1,306.98
  6. Step 6: Final answer
    x = 990.22

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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.