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Finding the Fourth Proportional to 4,979.61, 7,470.09 and 1,691.82

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Solution

The fourth proportional to 4,979.61, 7,470.09 and 1,691.82 is: 2,537.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.61 : 7,470.09 = 1,691.82 : x
  2. Step 2: Convert to fraction form
    4,979.61/7,470.09 = 1,691.82/x
  3. Step 3: Cross multiply
    4,979.61x = 7,470.09 × 1,691.82
  4. Step 4: Simplify right side
    4,979.61x = 12,638,047.66
  5. Step 5: Solve for x
    x = 12,638,047.66/4,979.61
  6. Step 6: Final answer
    x = 2,537.96

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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.