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Finding the Fourth Proportional to 46.55, 64.28 and 28.15

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Solution

The fourth proportional to 46.55, 64.28 and 28.15 is: 38.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.55 : 64.28 = 28.15 : x
  2. Step 2: Convert to fraction form
    46.55/64.28 = 28.15/x
  3. Step 3: Cross multiply
    46.55x = 64.28 × 28.15
  4. Step 4: Simplify right side
    46.55x = 1,809.39
  5. Step 5: Solve for x
    x = 1,809.39/46.55
  6. Step 6: Final answer
    x = 38.87

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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.