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Finding the Fourth Proportional to 666.26, 1,004.37 and 621.66

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Solution

The fourth proportional to 666.26, 1,004.37 and 621.66 is: 937.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.26 : 1,004.37 = 621.66 : x
  2. Step 2: Convert to fraction form
    666.26/1,004.37 = 621.66/x
  3. Step 3: Cross multiply
    666.26x = 1,004.37 × 621.66
  4. Step 4: Simplify right side
    666.26x = 624,371.63
  5. Step 5: Solve for x
    x = 624,371.63/666.26
  6. Step 6: Final answer
    x = 937.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.