Home / 2,120.04-3,178.98-1,427.76

Finding the Fourth Proportional to 2,120.04, 3,178.98 and 1,427.76

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Solution

The fourth proportional to 2,120.04, 3,178.98 and 1,427.76 is: 2,140.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.04 : 3,178.98 = 1,427.76 : x
  2. Step 2: Convert to fraction form
    2,120.04/3,178.98 = 1,427.76/x
  3. Step 3: Cross multiply
    2,120.04x = 3,178.98 × 1,427.76
  4. Step 4: Simplify right side
    2,120.04x = 4,538,820.48
  5. Step 5: Solve for x
    x = 4,538,820.48/2,120.04
  6. Step 6: Final answer
    x = 2,140.91

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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.