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Finding the Fourth Proportional to 673.38, 928.98 and 486.55

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Solution

The fourth proportional to 673.38, 928.98 and 486.55 is: 671.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.38 : 928.98 = 486.55 : x
  2. Step 2: Convert to fraction form
    673.38/928.98 = 486.55/x
  3. Step 3: Cross multiply
    673.38x = 928.98 × 486.55
  4. Step 4: Simplify right side
    673.38x = 451,995.91
  5. Step 5: Solve for x
    x = 451,995.91/673.38
  6. Step 6: Final answer
    x = 671.23

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.