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Finding the Fourth Proportional to 823.48, 1,136.33 and 557.38

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Solution

The fourth proportional to 823.48, 1,136.33 and 557.38 is: 769.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.48 : 1,136.33 = 557.38 : x
  2. Step 2: Convert to fraction form
    823.48/1,136.33 = 557.38/x
  3. Step 3: Cross multiply
    823.48x = 1,136.33 × 557.38
  4. Step 4: Simplify right side
    823.48x = 633,364.83
  5. Step 5: Solve for x
    x = 633,364.83/823.48
  6. Step 6: Final answer
    x = 769.13

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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.