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Finding the Fourth Proportional to 39.70, 54.91 and 37.07

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Solution

The fourth proportional to 39.70, 54.91 and 37.07 is: 51.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.70 : 54.91 = 37.07 : x
  2. Step 2: Convert to fraction form
    39.70/54.91 = 37.07/x
  3. Step 3: Cross multiply
    39.70x = 54.91 × 37.07
  4. Step 4: Simplify right side
    39.70x = 2,035.51
  5. Step 5: Solve for x
    x = 2,035.51/39.70
  6. Step 6: Final answer
    x = 51.27

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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.