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Finding the Fourth Proportional to 744.52, 1,110.96 and 666.63

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Solution

The fourth proportional to 744.52, 1,110.96 and 666.63 is: 994.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.52 : 1,110.96 = 666.63 : x
  2. Step 2: Convert to fraction form
    744.52/1,110.96 = 666.63/x
  3. Step 3: Cross multiply
    744.52x = 1,110.96 × 666.63
  4. Step 4: Simplify right side
    744.52x = 740,599.26
  5. Step 5: Solve for x
    x = 740,599.26/744.52
  6. Step 6: Final answer
    x = 994.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.