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Finding the Fourth Proportional to 426.18, 587.38 and 315.93

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Solution

The fourth proportional to 426.18, 587.38 and 315.93 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.18 : 587.38 = 315.93 : x
  2. Step 2: Convert to fraction form
    426.18/587.38 = 315.93/x
  3. Step 3: Cross multiply
    426.18x = 587.38 × 315.93
  4. Step 4: Simplify right side
    426.18x = 185,570.96
  5. Step 5: Solve for x
    x = 185,570.96/426.18
  6. Step 6: Final answer
    x = 435.43

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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.