Home / 2,118.32-3,178.08-1,077.76

Finding the Fourth Proportional to 2,118.32, 3,178.08 and 1,077.76

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Solution

The fourth proportional to 2,118.32, 3,178.08 and 1,077.76 is: 1,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.32 : 3,178.08 = 1,077.76 : x
  2. Step 2: Convert to fraction form
    2,118.32/3,178.08 = 1,077.76/x
  3. Step 3: Cross multiply
    2,118.32x = 3,178.08 × 1,077.76
  4. Step 4: Simplify right side
    2,118.32x = 3,425,207.50
  5. Step 5: Solve for x
    x = 3,425,207.50/2,118.32
  6. Step 6: Final answer
    x = 1,616.95

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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.