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Finding the Fourth Proportional to 46.40, 69.61 and 38.75

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Solution

The fourth proportional to 46.40, 69.61 and 38.75 is: 58.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.40 : 69.61 = 38.75 : x
  2. Step 2: Convert to fraction form
    46.40/69.61 = 38.75/x
  3. Step 3: Cross multiply
    46.40x = 69.61 × 38.75
  4. Step 4: Simplify right side
    46.40x = 2,697.39
  5. Step 5: Solve for x
    x = 2,697.39/46.40
  6. Step 6: Final answer
    x = 58.13

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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.