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Finding the Fourth Proportional to 194.79, 291.79 and 90.52

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Solution

The fourth proportional to 194.79, 291.79 and 90.52 is: 135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.79 : 291.79 = 90.52 : x
  2. Step 2: Convert to fraction form
    194.79/291.79 = 90.52/x
  3. Step 3: Cross multiply
    194.79x = 291.79 × 90.52
  4. Step 4: Simplify right side
    194.79x = 26,412.38
  5. Step 5: Solve for x
    x = 26,412.38/194.79
  6. Step 6: Final answer
    x = 135.60

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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.