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Finding the Fourth Proportional to 714.51, 1,071.68 and 252.30

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Solution

The fourth proportional to 714.51, 1,071.68 and 252.30 is: 378.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.51 : 1,071.68 = 252.30 : x
  2. Step 2: Convert to fraction form
    714.51/1,071.68 = 252.30/x
  3. Step 3: Cross multiply
    714.51x = 1,071.68 × 252.30
  4. Step 4: Simplify right side
    714.51x = 270,387.62
  5. Step 5: Solve for x
    x = 270,387.62/714.51
  6. Step 6: Final answer
    x = 378.42

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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.