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Finding the Fourth Proportional to 1,136.92, 1,569.72 and 738.76

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Solution

The fourth proportional to 1,136.92, 1,569.72 and 738.76 is: 1,019.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.92 : 1,569.72 = 738.76 : x
  2. Step 2: Convert to fraction form
    1,136.92/1,569.72 = 738.76/x
  3. Step 3: Cross multiply
    1,136.92x = 1,569.72 × 738.76
  4. Step 4: Simplify right side
    1,136.92x = 1,159,646.35
  5. Step 5: Solve for x
    x = 1,159,646.35/1,136.92
  6. Step 6: Final answer
    x = 1,019.99

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Double scale
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1.5x scale

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.