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Finding the Fourth Proportional to 1,101.68, 1,652.88 and 668.96

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Solution

The fourth proportional to 1,101.68, 1,652.88 and 668.96 is: 1,003.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.68 : 1,652.88 = 668.96 : x
  2. Step 2: Convert to fraction form
    1,101.68/1,652.88 = 668.96/x
  3. Step 3: Cross multiply
    1,101.68x = 1,652.88 × 668.96
  4. Step 4: Simplify right side
    1,101.68x = 1,105,710.60
  5. Step 5: Solve for x
    x = 1,105,710.60/1,101.68
  6. Step 6: Final answer
    x = 1,003.66

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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.