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Finding the Fourth Proportional to 37.40, 56.05 and 30.60

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Solution

The fourth proportional to 37.40, 56.05 and 30.60 is: 45.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.40 : 56.05 = 30.60 : x
  2. Step 2: Convert to fraction form
    37.40/56.05 = 30.60/x
  3. Step 3: Cross multiply
    37.40x = 56.05 × 30.60
  4. Step 4: Simplify right side
    37.40x = 1,715.05
  5. Step 5: Solve for x
    x = 1,715.05/37.40
  6. Step 6: Final answer
    x = 45.86

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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.