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Finding the Fourth Proportional to 194.50, 291.71 and 64.51

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Solution

The fourth proportional to 194.50, 291.71 and 64.51 is: 96.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.50 : 291.71 = 64.51 : x
  2. Step 2: Convert to fraction form
    194.50/291.71 = 64.51/x
  3. Step 3: Cross multiply
    194.50x = 291.71 × 64.51
  4. Step 4: Simplify right side
    194.50x = 18,818.38
  5. Step 5: Solve for x
    x = 18,818.38/194.50
  6. Step 6: Final answer
    x = 96.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.