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Finding the Fourth Proportional to 714.29, 1,070.82 and 251.78

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Solution

The fourth proportional to 714.29, 1,070.82 and 251.78 is: 377.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.29 : 1,070.82 = 251.78 : x
  2. Step 2: Convert to fraction form
    714.29/1,070.82 = 251.78/x
  3. Step 3: Cross multiply
    714.29x = 1,070.82 × 251.78
  4. Step 4: Simplify right side
    714.29x = 269,605.71
  5. Step 5: Solve for x
    x = 269,605.71/714.29
  6. Step 6: Final answer
    x = 377.45

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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.