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Finding the Fourth Proportional to 714.01, 1,071.62 and 281.47

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Solution

The fourth proportional to 714.01, 1,071.62 and 281.47 is: 422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.01 : 1,071.62 = 281.47 : x
  2. Step 2: Convert to fraction form
    714.01/1,071.62 = 281.47/x
  3. Step 3: Cross multiply
    714.01x = 1,071.62 × 281.47
  4. Step 4: Simplify right side
    714.01x = 301,628.88
  5. Step 5: Solve for x
    x = 301,628.88/714.01
  6. Step 6: Final answer
    x = 422.44

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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.