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Finding the Fourth Proportional to 2,988.60, 4,472.10 and 2,016.60

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Solution

The fourth proportional to 2,988.60, 4,472.10 and 2,016.60 is: 3,017.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.60 : 4,472.10 = 2,016.60 : x
  2. Step 2: Convert to fraction form
    2,988.60/4,472.10 = 2,016.60/x
  3. Step 3: Cross multiply
    2,988.60x = 4,472.10 × 2,016.60
  4. Step 4: Simplify right side
    2,988.60x = 9,018,436.86
  5. Step 5: Solve for x
    x = 9,018,436.86/2,988.60
  6. Step 6: Final answer
    x = 3,017.61

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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.