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Finding the Fourth Proportional to 748.81, 1,033.86 and 669.88

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Solution

The fourth proportional to 748.81, 1,033.86 and 669.88 is: 924.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.81 : 1,033.86 = 669.88 : x
  2. Step 2: Convert to fraction form
    748.81/1,033.86 = 669.88/x
  3. Step 3: Cross multiply
    748.81x = 1,033.86 × 669.88
  4. Step 4: Simplify right side
    748.81x = 692,562.14
  5. Step 5: Solve for x
    x = 692,562.14/748.81
  6. Step 6: Final answer
    x = 924.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.