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Finding the Fourth Proportional to 1,723.96, 2,379.16 and 977.94

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Solution

The fourth proportional to 1,723.96, 2,379.16 and 977.94 is: 1,349.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,723.96 : 2,379.16 = 977.94 : x
  2. Step 2: Convert to fraction form
    1,723.96/2,379.16 = 977.94/x
  3. Step 3: Cross multiply
    1,723.96x = 2,379.16 × 977.94
  4. Step 4: Simplify right side
    1,723.96x = 2,326,675.73
  5. Step 5: Solve for x
    x = 2,326,675.73/1,723.96
  6. Step 6: Final answer
    x = 1,349.61

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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.