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Finding the Fourth Proportional to 411.91, 568.64 and 281.60

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Solution

The fourth proportional to 411.91, 568.64 and 281.60 is: 388.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.91 : 568.64 = 281.60 : x
  2. Step 2: Convert to fraction form
    411.91/568.64 = 281.60/x
  3. Step 3: Cross multiply
    411.91x = 568.64 × 281.60
  4. Step 4: Simplify right side
    411.91x = 160,129.02
  5. Step 5: Solve for x
    x = 160,129.02/411.91
  6. Step 6: Final answer
    x = 388.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.