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Finding the Fourth Proportional to 484.92, 669.28 and 275.12

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Solution

The fourth proportional to 484.92, 669.28 and 275.12 is: 379.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.92 : 669.28 = 275.12 : x
  2. Step 2: Convert to fraction form
    484.92/669.28 = 275.12/x
  3. Step 3: Cross multiply
    484.92x = 669.28 × 275.12
  4. Step 4: Simplify right side
    484.92x = 184,132.31
  5. Step 5: Solve for x
    x = 184,132.31/484.92
  6. Step 6: Final answer
    x = 379.72

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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.