Home / 3,111.04-4,665.84-919.20

Finding the Fourth Proportional to 3,111.04, 4,665.84 and 919.20

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Solution

The fourth proportional to 3,111.04, 4,665.84 and 919.20 is: 1,378.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.04 : 4,665.84 = 919.20 : x
  2. Step 2: Convert to fraction form
    3,111.04/4,665.84 = 919.20/x
  3. Step 3: Cross multiply
    3,111.04x = 4,665.84 × 919.20
  4. Step 4: Simplify right side
    3,111.04x = 4,288,840.13
  5. Step 5: Solve for x
    x = 4,288,840.13/3,111.04
  6. Step 6: Final answer
    x = 1,378.59

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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.