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Finding the Fourth Proportional to 1,723.82, 2,379.12 and 977.97

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Solution

The fourth proportional to 1,723.82, 2,379.12 and 977.97 is: 1,349.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,723.82 : 2,379.12 = 977.97 : x
  2. Step 2: Convert to fraction form
    1,723.82/2,379.12 = 977.97/x
  3. Step 3: Cross multiply
    1,723.82x = 2,379.12 × 977.97
  4. Step 4: Simplify right side
    1,723.82x = 2,326,691.20
  5. Step 5: Solve for x
    x = 2,326,691.20/1,723.82
  6. Step 6: Final answer
    x = 1,349.73

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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.