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Finding the Fourth Proportional to 746.55, 1,114.08 and 664.50

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Solution

The fourth proportional to 746.55, 1,114.08 and 664.50 is: 991.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.55 : 1,114.08 = 664.50 : x
  2. Step 2: Convert to fraction form
    746.55/1,114.08 = 664.50/x
  3. Step 3: Cross multiply
    746.55x = 1,114.08 × 664.50
  4. Step 4: Simplify right side
    746.55x = 740,306.16
  5. Step 5: Solve for x
    x = 740,306.16/746.55
  6. Step 6: Final answer
    x = 991.64

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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.