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Finding the Fourth Proportional to 886.85, 1,330.48 and 270.55

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Solution

The fourth proportional to 886.85, 1,330.48 and 270.55 is: 405.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.85 : 1,330.48 = 270.55 : x
  2. Step 2: Convert to fraction form
    886.85/1,330.48 = 270.55/x
  3. Step 3: Cross multiply
    886.85x = 1,330.48 × 270.55
  4. Step 4: Simplify right side
    886.85x = 359,964.89
  5. Step 5: Solve for x
    x = 359,964.89/886.85
  6. Step 6: Final answer
    x = 405.89

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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.