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Finding the Fourth Proportional to 666.20, 999.10 and 276.19

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Solution

The fourth proportional to 666.20, 999.10 and 276.19 is: 414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.20 : 999.10 = 276.19 : x
  2. Step 2: Convert to fraction form
    666.20/999.10 = 276.19/x
  3. Step 3: Cross multiply
    666.20x = 999.10 × 276.19
  4. Step 4: Simplify right side
    666.20x = 275,941.43
  5. Step 5: Solve for x
    x = 275,941.43/666.20
  6. Step 6: Final answer
    x = 414.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.