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Finding the Fourth Proportional to 57.82, 79.89 and 46.89

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Solution

The fourth proportional to 57.82, 79.89 and 46.89 is: 64.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.82 : 79.89 = 46.89 : x
  2. Step 2: Convert to fraction form
    57.82/79.89 = 46.89/x
  3. Step 3: Cross multiply
    57.82x = 79.89 × 46.89
  4. Step 4: Simplify right side
    57.82x = 3,746.04
  5. Step 5: Solve for x
    x = 3,746.04/57.82
  6. Step 6: Final answer
    x = 64.79

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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.