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Finding the Fourth Proportional to 40, 55.20 and 37.58

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Solution

The fourth proportional to 40, 55.20 and 37.58 is: 51.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40 : 55.20 = 37.58 : x
  2. Step 2: Convert to fraction form
    40/55.20 = 37.58/x
  3. Step 3: Cross multiply
    40x = 55.20 × 37.58
  4. Step 4: Simplify right side
    40x = 2,074.42
  5. Step 5: Solve for x
    x = 2,074.42/40
  6. Step 6: Final answer
    x = 51.86

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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.