Home / 2,217.87-3,060.90-1,378.89

Finding the Fourth Proportional to 2,217.87, 3,060.90 and 1,378.89

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Solution

The fourth proportional to 2,217.87, 3,060.90 and 1,378.89 is: 1,903.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.87 : 3,060.90 = 1,378.89 : x
  2. Step 2: Convert to fraction form
    2,217.87/3,060.90 = 1,378.89/x
  3. Step 3: Cross multiply
    2,217.87x = 3,060.90 × 1,378.89
  4. Step 4: Simplify right side
    2,217.87x = 4,220,644.40
  5. Step 5: Solve for x
    x = 4,220,644.40/2,217.87
  6. Step 6: Final answer
    x = 1,903.02

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1.5x scale

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.