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Finding the Fourth Proportional to 426.13, 587.51 and 315.41

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Solution

The fourth proportional to 426.13, 587.51 and 315.41 is: 434.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.13 : 587.51 = 315.41 : x
  2. Step 2: Convert to fraction form
    426.13/587.51 = 315.41/x
  3. Step 3: Cross multiply
    426.13x = 587.51 × 315.41
  4. Step 4: Simplify right side
    426.13x = 185,304.95
  5. Step 5: Solve for x
    x = 185,304.95/426.13
  6. Step 6: Final answer
    x = 434.86

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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.