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Finding the Fourth Proportional to 684.38, 944.51 and 422.48

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Solution

The fourth proportional to 684.38, 944.51 and 422.48 is: 583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.38 : 944.51 = 422.48 : x
  2. Step 2: Convert to fraction form
    684.38/944.51 = 422.48/x
  3. Step 3: Cross multiply
    684.38x = 944.51 × 422.48
  4. Step 4: Simplify right side
    684.38x = 399,029.75
  5. Step 5: Solve for x
    x = 399,029.75/684.38
  6. Step 6: Final answer
    x = 583.06

Related Problems

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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.