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Finding the Fourth Proportional to 667.47, 1,001.21 and 180.50

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Solution

The fourth proportional to 667.47, 1,001.21 and 180.50 is: 270.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.47 : 1,001.21 = 180.50 : x
  2. Step 2: Convert to fraction form
    667.47/1,001.21 = 180.50/x
  3. Step 3: Cross multiply
    667.47x = 1,001.21 × 180.50
  4. Step 4: Simplify right side
    667.47x = 180,721.96
  5. Step 5: Solve for x
    x = 180,721.96/667.47
  6. Step 6: Final answer
    x = 270.76

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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.