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Finding the Fourth Proportional to 714.26, 1,071.06 and 281.31

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Solution

The fourth proportional to 714.26, 1,071.06 and 281.31 is: 421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.26 : 1,071.06 = 281.31 : x
  2. Step 2: Convert to fraction form
    714.26/1,071.06 = 281.31/x
  3. Step 3: Cross multiply
    714.26x = 1,071.06 × 281.31
  4. Step 4: Simplify right side
    714.26x = 301,299.89
  5. Step 5: Solve for x
    x = 301,299.89/714.26
  6. Step 6: Final answer
    x = 421.84

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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.