Home / 2,145.95-3,215.85-1,219.55

Finding the Fourth Proportional to 2,145.95, 3,215.85 and 1,219.55

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Solution

The fourth proportional to 2,145.95, 3,215.85 and 1,219.55 is: 1,827.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.95 : 3,215.85 = 1,219.55 : x
  2. Step 2: Convert to fraction form
    2,145.95/3,215.85 = 1,219.55/x
  3. Step 3: Cross multiply
    2,145.95x = 3,215.85 × 1,219.55
  4. Step 4: Simplify right side
    2,145.95x = 3,921,889.87
  5. Step 5: Solve for x
    x = 3,921,889.87/2,145.95
  6. Step 6: Final answer
    x = 1,827.58

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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.