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Finding the Fourth Proportional to 454.71, 681.62 and 194.78

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Solution

The fourth proportional to 454.71, 681.62 and 194.78 is: 291.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.71 : 681.62 = 194.78 : x
  2. Step 2: Convert to fraction form
    454.71/681.62 = 194.78/x
  3. Step 3: Cross multiply
    454.71x = 681.62 × 194.78
  4. Step 4: Simplify right side
    454.71x = 132,763.94
  5. Step 5: Solve for x
    x = 132,763.94/454.71
  6. Step 6: Final answer
    x = 291.98

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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.