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Finding the Fourth Proportional to 1,270.98, 1,753.77 and 711.39

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Solution

The fourth proportional to 1,270.98, 1,753.77 and 711.39 is: 981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.98 : 1,753.77 = 711.39 : x
  2. Step 2: Convert to fraction form
    1,270.98/1,753.77 = 711.39/x
  3. Step 3: Cross multiply
    1,270.98x = 1,753.77 × 711.39
  4. Step 4: Simplify right side
    1,270.98x = 1,247,614.44
  5. Step 5: Solve for x
    x = 1,247,614.44/1,270.98
  6. Step 6: Final answer
    x = 981.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.