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Finding the Fourth Proportional to 1,100.20, 1,648.90 and 450.20

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Solution

The fourth proportional to 1,100.20, 1,648.90 and 450.20 is: 674.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.20 : 1,648.90 = 450.20 : x
  2. Step 2: Convert to fraction form
    1,100.20/1,648.90 = 450.20/x
  3. Step 3: Cross multiply
    1,100.20x = 1,648.90 × 450.20
  4. Step 4: Simplify right side
    1,100.20x = 742,334.78
  5. Step 5: Solve for x
    x = 742,334.78/1,100.20
  6. Step 6: Final answer
    x = 674.73

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1.5x scale

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.