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Finding the Fourth Proportional to 666.72, 1,001.70 and 626.76

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Solution

The fourth proportional to 666.72, 1,001.70 and 626.76 is: 941.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.72 : 1,001.70 = 626.76 : x
  2. Step 2: Convert to fraction form
    666.72/1,001.70 = 626.76/x
  3. Step 3: Cross multiply
    666.72x = 1,001.70 × 626.76
  4. Step 4: Simplify right side
    666.72x = 627,825.49
  5. Step 5: Solve for x
    x = 627,825.49/666.72
  6. Step 6: Final answer
    x = 941.66

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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.