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Finding the Fourth Proportional to 813.38, 1,123.37 and 550.94

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Solution

The fourth proportional to 813.38, 1,123.37 and 550.94 is: 760.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.38 : 1,123.37 = 550.94 : x
  2. Step 2: Convert to fraction form
    813.38/1,123.37 = 550.94/x
  3. Step 3: Cross multiply
    813.38x = 1,123.37 × 550.94
  4. Step 4: Simplify right side
    813.38x = 618,903.16
  5. Step 5: Solve for x
    x = 618,903.16/813.38
  6. Step 6: Final answer
    x = 760.91

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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.