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Finding the Fourth Proportional to 823.70, 1,136.68 and 450.68

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Solution

The fourth proportional to 823.70, 1,136.68 and 450.68 is: 621.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.70 : 1,136.68 = 450.68 : x
  2. Step 2: Convert to fraction form
    823.70/1,136.68 = 450.68/x
  3. Step 3: Cross multiply
    823.70x = 1,136.68 × 450.68
  4. Step 4: Simplify right side
    823.70x = 512,278.94
  5. Step 5: Solve for x
    x = 512,278.94/823.70
  6. Step 6: Final answer
    x = 621.92

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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.