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Finding the Fourth Proportional to 3,627.25, 5,440.88 and 891.25

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Solution

The fourth proportional to 3,627.25, 5,440.88 and 891.25 is: 1,336.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,627.25 : 5,440.88 = 891.25 : x
  2. Step 2: Convert to fraction form
    3,627.25/5,440.88 = 891.25/x
  3. Step 3: Cross multiply
    3,627.25x = 5,440.88 × 891.25
  4. Step 4: Simplify right side
    3,627.25x = 4,849,184.30
  5. Step 5: Solve for x
    x = 4,849,184.30/3,627.25
  6. Step 6: Final answer
    x = 1,336.88

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Similar ratio
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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.