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Finding the Fourth Proportional to 483.40, 724.66 and 194.64

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Solution

The fourth proportional to 483.40, 724.66 and 194.64 is: 291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.40 : 724.66 = 194.64 : x
  2. Step 2: Convert to fraction form
    483.40/724.66 = 194.64/x
  3. Step 3: Cross multiply
    483.40x = 724.66 × 194.64
  4. Step 4: Simplify right side
    483.40x = 141,047.82
  5. Step 5: Solve for x
    x = 141,047.82/483.40
  6. Step 6: Final answer
    x = 291.78

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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.