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Finding the Fourth Proportional to 483.42, 724.54 and 190.65

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Solution

The fourth proportional to 483.42, 724.54 and 190.65 is: 285.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.42 : 724.54 = 190.65 : x
  2. Step 2: Convert to fraction form
    483.42/724.54 = 190.65/x
  3. Step 3: Cross multiply
    483.42x = 724.54 × 190.65
  4. Step 4: Simplify right side
    483.42x = 138,128.98
  5. Step 5: Solve for x
    x = 138,128.98/483.42
  6. Step 6: Final answer
    x = 285.74

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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.