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Finding the Fourth Proportional to 5,308.77, 7,326.09 and 2,918.72

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Solution

The fourth proportional to 5,308.77, 7,326.09 and 2,918.72 is: 4,027.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.77 : 7,326.09 = 2,918.72 : x
  2. Step 2: Convert to fraction form
    5,308.77/7,326.09 = 2,918.72/x
  3. Step 3: Cross multiply
    5,308.77x = 7,326.09 × 2,918.72
  4. Step 4: Simplify right side
    5,308.77x = 21,382,768.77
  5. Step 5: Solve for x
    x = 21,382,768.77/5,308.77
  6. Step 6: Final answer
    x = 4,027.82

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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.