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Finding the Fourth Proportional to 426.11, 587.98 and 286.20

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Solution

The fourth proportional to 426.11, 587.98 and 286.20 is: 394.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.11 : 587.98 = 286.20 : x
  2. Step 2: Convert to fraction form
    426.11/587.98 = 286.20/x
  3. Step 3: Cross multiply
    426.11x = 587.98 × 286.20
  4. Step 4: Simplify right side
    426.11x = 168,280.23
  5. Step 5: Solve for x
    x = 168,280.23/426.11
  6. Step 6: Final answer
    x = 394.93

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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.