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Finding the Fourth Proportional to 813.96, 1,123.10 and 482.26

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Solution

The fourth proportional to 813.96, 1,123.10 and 482.26 is: 665.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.96 : 1,123.10 = 482.26 : x
  2. Step 2: Convert to fraction form
    813.96/1,123.10 = 482.26/x
  3. Step 3: Cross multiply
    813.96x = 1,123.10 × 482.26
  4. Step 4: Simplify right side
    813.96x = 541,626.21
  5. Step 5: Solve for x
    x = 541,626.21/813.96
  6. Step 6: Final answer
    x = 665.42

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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.