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Finding the Fourth Proportional to 65.82, 90.87 and 41.30

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Solution

The fourth proportional to 65.82, 90.87 and 41.30 is: 57.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.82 : 90.87 = 41.30 : x
  2. Step 2: Convert to fraction form
    65.82/90.87 = 41.30/x
  3. Step 3: Cross multiply
    65.82x = 90.87 × 41.30
  4. Step 4: Simplify right side
    65.82x = 3,752.27
  5. Step 5: Solve for x
    x = 3,752.27/65.82
  6. Step 6: Final answer
    x = 57.01

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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.