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Finding the Fourth Proportional to 39.36, 58.63 and 37.91

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Solution

The fourth proportional to 39.36, 58.63 and 37.91 is: 56.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.36 : 58.63 = 37.91 : x
  2. Step 2: Convert to fraction form
    39.36/58.63 = 37.91/x
  3. Step 3: Cross multiply
    39.36x = 58.63 × 37.91
  4. Step 4: Simplify right side
    39.36x = 2,222.42
  5. Step 5: Solve for x
    x = 2,222.42/39.36
  6. Step 6: Final answer
    x = 56.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.