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Finding the Fourth Proportional to 816.44, 1,126.56 and 462.38

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Solution

The fourth proportional to 816.44, 1,126.56 and 462.38 is: 638.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.44 : 1,126.56 = 462.38 : x
  2. Step 2: Convert to fraction form
    816.44/1,126.56 = 462.38/x
  3. Step 3: Cross multiply
    816.44x = 1,126.56 × 462.38
  4. Step 4: Simplify right side
    816.44x = 520,898.81
  5. Step 5: Solve for x
    x = 520,898.81/816.44
  6. Step 6: Final answer
    x = 638.01

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Half scale
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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.