Home / 2,219.10-3,306.60-2,135.40

Finding the Fourth Proportional to 2,219.10, 3,306.60 and 2,135.40

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Solution

The fourth proportional to 2,219.10, 3,306.60 and 2,135.40 is: 3,181.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.10 : 3,306.60 = 2,135.40 : x
  2. Step 2: Convert to fraction form
    2,219.10/3,306.60 = 2,135.40/x
  3. Step 3: Cross multiply
    2,219.10x = 3,306.60 × 2,135.40
  4. Step 4: Simplify right side
    2,219.10x = 7,060,913.64
  5. Step 5: Solve for x
    x = 7,060,913.64/2,219.10
  6. Step 6: Final answer
    x = 3,181.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.