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Finding the Fourth Proportional to 714.60, 1,072.41 and 281.73

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Solution

The fourth proportional to 714.60, 1,072.41 and 281.73 is: 422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.60 : 1,072.41 = 281.73 : x
  2. Step 2: Convert to fraction form
    714.60/1,072.41 = 281.73/x
  3. Step 3: Cross multiply
    714.60x = 1,072.41 × 281.73
  4. Step 4: Simplify right side
    714.60x = 302,130.07
  5. Step 5: Solve for x
    x = 302,130.07/714.60
  6. Step 6: Final answer
    x = 422.80

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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.