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Finding the Fourth Proportional to 683.38, 944.30 and 486.55

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Solution

The fourth proportional to 683.38, 944.30 and 486.55 is: 672.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.38 : 944.30 = 486.55 : x
  2. Step 2: Convert to fraction form
    683.38/944.30 = 486.55/x
  3. Step 3: Cross multiply
    683.38x = 944.30 × 486.55
  4. Step 4: Simplify right side
    683.38x = 459,444.37
  5. Step 5: Solve for x
    x = 459,444.37/683.38
  6. Step 6: Final answer
    x = 672.31

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.