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Finding the Fourth Proportional to 587.28, 881.38 and 313.61

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Solution

The fourth proportional to 587.28, 881.38 and 313.61 is: 470.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.28 : 881.38 = 313.61 : x
  2. Step 2: Convert to fraction form
    587.28/881.38 = 313.61/x
  3. Step 3: Cross multiply
    587.28x = 881.38 × 313.61
  4. Step 4: Simplify right side
    587.28x = 276,405.57
  5. Step 5: Solve for x
    x = 276,405.57/587.28
  6. Step 6: Final answer
    x = 470.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.