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Finding the Fourth Proportional to 587.31, 881.16 and 485.64

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Solution

The fourth proportional to 587.31, 881.16 and 485.64 is: 728.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.31 : 881.16 = 485.64 : x
  2. Step 2: Convert to fraction form
    587.31/881.16 = 485.64/x
  3. Step 3: Cross multiply
    587.31x = 881.16 × 485.64
  4. Step 4: Simplify right side
    587.31x = 427,926.54
  5. Step 5: Solve for x
    x = 427,926.54/587.31
  6. Step 6: Final answer
    x = 728.62

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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.