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Finding the Fourth Proportional to 45.07, 62.17 and 31.25

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Solution

The fourth proportional to 45.07, 62.17 and 31.25 is: 43.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.07 : 62.17 = 31.25 : x
  2. Step 2: Convert to fraction form
    45.07/62.17 = 31.25/x
  3. Step 3: Cross multiply
    45.07x = 62.17 × 31.25
  4. Step 4: Simplify right side
    45.07x = 1,942.81
  5. Step 5: Solve for x
    x = 1,942.81/45.07
  6. Step 6: Final answer
    x = 43.11

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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.