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Finding the Fourth Proportional to 194.90, 292.38 and 64.89

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Solution

The fourth proportional to 194.90, 292.38 and 64.89 is: 97.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.90 : 292.38 = 64.89 : x
  2. Step 2: Convert to fraction form
    194.90/292.38 = 64.89/x
  3. Step 3: Cross multiply
    194.90x = 292.38 × 64.89
  4. Step 4: Simplify right side
    194.90x = 18,972.21
  5. Step 5: Solve for x
    x = 18,972.21/194.90
  6. Step 6: Final answer
    x = 97.35

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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.