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Finding the Fourth Proportional to 34.90, 52.07 and 31.05

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Solution

The fourth proportional to 34.90, 52.07 and 31.05 is: 46.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.90 : 52.07 = 31.05 : x
  2. Step 2: Convert to fraction form
    34.90/52.07 = 31.05/x
  3. Step 3: Cross multiply
    34.90x = 52.07 × 31.05
  4. Step 4: Simplify right side
    34.90x = 1,616.77
  5. Step 5: Solve for x
    x = 1,616.77/34.90
  6. Step 6: Final answer
    x = 46.33

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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.