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Finding the Fourth Proportional to 1,136.83, 1,569.71 and 887.71

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Solution

The fourth proportional to 1,136.83, 1,569.71 and 887.71 is: 1,225.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.83 : 1,569.71 = 887.71 : x
  2. Step 2: Convert to fraction form
    1,136.83/1,569.71 = 887.71/x
  3. Step 3: Cross multiply
    1,136.83x = 1,569.71 × 887.71
  4. Step 4: Simplify right side
    1,136.83x = 1,393,438.90
  5. Step 5: Solve for x
    x = 1,393,438.90/1,136.83
  6. Step 6: Final answer
    x = 1,225.73

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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.