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Finding the Fourth Proportional to 426.28, 587.08 and 396.04

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Solution

The fourth proportional to 426.28, 587.08 and 396.04 is: 545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.28 : 587.08 = 396.04 : x
  2. Step 2: Convert to fraction form
    426.28/587.08 = 396.04/x
  3. Step 3: Cross multiply
    426.28x = 587.08 × 396.04
  4. Step 4: Simplify right side
    426.28x = 232,507.16
  5. Step 5: Solve for x
    x = 232,507.16/426.28
  6. Step 6: Final answer
    x = 545.43

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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.