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Finding the Fourth Proportional to 2,001.20, 2,998.20 and 1,880.72

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Solution

The fourth proportional to 2,001.20, 2,998.20 and 1,880.72 is: 2,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,001.20 : 2,998.20 = 1,880.72 : x
  2. Step 2: Convert to fraction form
    2,001.20/2,998.20 = 1,880.72/x
  3. Step 3: Cross multiply
    2,001.20x = 2,998.20 × 1,880.72
  4. Step 4: Simplify right side
    2,001.20x = 5,638,774.70
  5. Step 5: Solve for x
    x = 5,638,774.70/2,001.20
  6. Step 6: Final answer
    x = 2,817.70

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1.5x scale

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.