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Finding the Fourth Proportional to 1,200.20, 1,656.60 and 758.24

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Solution

The fourth proportional to 1,200.20, 1,656.60 and 758.24 is: 1,046.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.20 : 1,656.60 = 758.24 : x
  2. Step 2: Convert to fraction form
    1,200.20/1,656.60 = 758.24/x
  3. Step 3: Cross multiply
    1,200.20x = 1,656.60 × 758.24
  4. Step 4: Simplify right side
    1,200.20x = 1,256,100.38
  5. Step 5: Solve for x
    x = 1,256,100.38/1,200.20
  6. Step 6: Final answer
    x = 1,046.58

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1.5x scale

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.