Home / 1,001.20-1,380.88-669.52

Finding the Fourth Proportional to 1,001.20, 1,380.88 and 669.52

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Solution

The fourth proportional to 1,001.20, 1,380.88 and 669.52 is: 923.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.20 : 1,380.88 = 669.52 : x
  2. Step 2: Convert to fraction form
    1,001.20/1,380.88 = 669.52/x
  3. Step 3: Cross multiply
    1,001.20x = 1,380.88 × 669.52
  4. Step 4: Simplify right side
    1,001.20x = 924,526.78
  5. Step 5: Solve for x
    x = 924,526.78/1,001.20
  6. Step 6: Final answer
    x = 923.42

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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.