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Finding the Fourth Proportional to 40, 55.20 and 25.46

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Solution

The fourth proportional to 40, 55.20 and 25.46 is: 35.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40 : 55.20 = 25.46 : x
  2. Step 2: Convert to fraction form
    40/55.20 = 25.46/x
  3. Step 3: Cross multiply
    40x = 55.20 × 25.46
  4. Step 4: Simplify right side
    40x = 1,405.39
  5. Step 5: Solve for x
    x = 1,405.39/40
  6. Step 6: Final answer
    x = 35.13

Related Problems

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Similar ratio
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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.