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Finding the Fourth Proportional to 39.70, 55.03 and 37.45

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Solution

The fourth proportional to 39.70, 55.03 and 37.45 is: 51.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.70 : 55.03 = 37.45 : x
  2. Step 2: Convert to fraction form
    39.70/55.03 = 37.45/x
  3. Step 3: Cross multiply
    39.70x = 55.03 × 37.45
  4. Step 4: Simplify right side
    39.70x = 2,060.87
  5. Step 5: Solve for x
    x = 2,060.87/39.70
  6. Step 6: Final answer
    x = 51.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.