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Finding the Fourth Proportional to 39.18, 58.81 and 37.45

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Solution

The fourth proportional to 39.18, 58.81 and 37.45 is: 56.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.18 : 58.81 = 37.45 : x
  2. Step 2: Convert to fraction form
    39.18/58.81 = 37.45/x
  3. Step 3: Cross multiply
    39.18x = 58.81 × 37.45
  4. Step 4: Simplify right side
    39.18x = 2,202.43
  5. Step 5: Solve for x
    x = 2,202.43/39.18
  6. Step 6: Final answer
    x = 56.21

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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.