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Finding the Fourth Proportional to 816.45, 1,126.78 and 462.44

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Solution

The fourth proportional to 816.45, 1,126.78 and 462.44 is: 638.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.45 : 1,126.78 = 462.44 : x
  2. Step 2: Convert to fraction form
    816.45/1,126.78 = 462.44/x
  3. Step 3: Cross multiply
    816.45x = 1,126.78 × 462.44
  4. Step 4: Simplify right side
    816.45x = 521,069.80
  5. Step 5: Solve for x
    x = 521,069.80/816.45
  6. Step 6: Final answer
    x = 638.22

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Half scale
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Double scale
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Similar ratio
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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.