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Finding the Fourth Proportional to 4,940.61, 7,410.96 and 1,979.31

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Solution

The fourth proportional to 4,940.61, 7,410.96 and 1,979.31 is: 2,968.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,940.61 : 7,410.96 = 1,979.31 : x
  2. Step 2: Convert to fraction form
    4,940.61/7,410.96 = 1,979.31/x
  3. Step 3: Cross multiply
    4,940.61x = 7,410.96 × 1,979.31
  4. Step 4: Simplify right side
    4,940.61x = 14,668,587.24
  5. Step 5: Solve for x
    x = 14,668,587.24/4,940.61
  6. Step 6: Final answer
    x = 2,968.98

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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.