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Finding the Fourth Proportional to 667.10, 999.95 and 276.66

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Solution

The fourth proportional to 667.10, 999.95 and 276.66 is: 414.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.10 : 999.95 = 276.66 : x
  2. Step 2: Convert to fraction form
    667.10/999.95 = 276.66/x
  3. Step 3: Cross multiply
    667.10x = 999.95 × 276.66
  4. Step 4: Simplify right side
    667.10x = 276,646.17
  5. Step 5: Solve for x
    x = 276,646.17/667.10
  6. Step 6: Final answer
    x = 414.70

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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.