Home / 2,415.40-3,621.84-1,115.76

Finding the Fourth Proportional to 2,415.40, 3,621.84 and 1,115.76

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Solution

The fourth proportional to 2,415.40, 3,621.84 and 1,115.76 is: 1,673.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.40 : 3,621.84 = 1,115.76 : x
  2. Step 2: Convert to fraction form
    2,415.40/3,621.84 = 1,115.76/x
  3. Step 3: Cross multiply
    2,415.40x = 3,621.84 × 1,115.76
  4. Step 4: Simplify right side
    2,415.40x = 4,041,104.20
  5. Step 5: Solve for x
    x = 4,041,104.20/2,415.40
  6. Step 6: Final answer
    x = 1,673.06

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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.