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Finding the Fourth Proportional to 46.50, 64.14 and 31.76

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Solution

The fourth proportional to 46.50, 64.14 and 31.76 is: 43.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.50 : 64.14 = 31.76 : x
  2. Step 2: Convert to fraction form
    46.50/64.14 = 31.76/x
  3. Step 3: Cross multiply
    46.50x = 64.14 × 31.76
  4. Step 4: Simplify right side
    46.50x = 2,037.09
  5. Step 5: Solve for x
    x = 2,037.09/46.50
  6. Step 6: Final answer
    x = 43.81

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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.