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Finding the Fourth Proportional to 587.72, 881.28 and 309.80

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Solution

The fourth proportional to 587.72, 881.28 and 309.80 is: 464.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.72 : 881.28 = 309.80 : x
  2. Step 2: Convert to fraction form
    587.72/881.28 = 309.80/x
  3. Step 3: Cross multiply
    587.72x = 881.28 × 309.80
  4. Step 4: Simplify right side
    587.72x = 273,020.54
  5. Step 5: Solve for x
    x = 273,020.54/587.72
  6. Step 6: Final answer
    x = 464.54

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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.