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Finding the Fourth Proportional to 65.65, 89.46 and 64.17

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Solution

The fourth proportional to 65.65, 89.46 and 64.17 is: 87.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.65 : 89.46 = 64.17 : x
  2. Step 2: Convert to fraction form
    65.65/89.46 = 64.17/x
  3. Step 3: Cross multiply
    65.65x = 89.46 × 64.17
  4. Step 4: Simplify right side
    65.65x = 5,740.65
  5. Step 5: Solve for x
    x = 5,740.65/65.65
  6. Step 6: Final answer
    x = 87.44

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These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.