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Finding the Fourth Proportional to 1,136.97, 1,569.54 and 717.53

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Solution

The fourth proportional to 1,136.97, 1,569.54 and 717.53 is: 990.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.97 : 1,569.54 = 717.53 : x
  2. Step 2: Convert to fraction form
    1,136.97/1,569.54 = 717.53/x
  3. Step 3: Cross multiply
    1,136.97x = 1,569.54 × 717.53
  4. Step 4: Simplify right side
    1,136.97x = 1,126,184.19
  5. Step 5: Solve for x
    x = 1,126,184.19/1,136.97
  6. Step 6: Final answer
    x = 990.51

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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.