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Finding the Fourth Proportional to 2,988.78, 4,124.46 and 1,662.46

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Solution

The fourth proportional to 2,988.78, 4,124.46 and 1,662.46 is: 2,294.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.78 : 4,124.46 = 1,662.46 : x
  2. Step 2: Convert to fraction form
    2,988.78/4,124.46 = 1,662.46/x
  3. Step 3: Cross multiply
    2,988.78x = 4,124.46 × 1,662.46
  4. Step 4: Simplify right side
    2,988.78x = 6,856,739.46
  5. Step 5: Solve for x
    x = 6,856,739.46/2,988.78
  6. Step 6: Final answer
    x = 2,294.16

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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.