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Finding the Fourth Proportional to 65.64, 90.59 and 36.53

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Solution

The fourth proportional to 65.64, 90.59 and 36.53 is: 50.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.64 : 90.59 = 36.53 : x
  2. Step 2: Convert to fraction form
    65.64/90.59 = 36.53/x
  3. Step 3: Cross multiply
    65.64x = 90.59 × 36.53
  4. Step 4: Simplify right side
    65.64x = 3,309.30
  5. Step 5: Solve for x
    x = 3,309.30/65.64
  6. Step 6: Final answer
    x = 50.42

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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.