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Finding the Fourth Proportional to 71.25, 98.28 and 46.69

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Solution

The fourth proportional to 71.25, 98.28 and 46.69 is: 64.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.25 : 98.28 = 46.69 : x
  2. Step 2: Convert to fraction form
    71.25/98.28 = 46.69/x
  3. Step 3: Cross multiply
    71.25x = 98.28 × 46.69
  4. Step 4: Simplify right side
    71.25x = 4,587.97
  5. Step 5: Solve for x
    x = 4,587.97/71.25
  6. Step 6: Final answer
    x = 64.40

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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.