Home / 2,981.40-4,111.32-2,318.01

Finding the Fourth Proportional to 2,981.40, 4,111.32 and 2,318.01

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Solution

The fourth proportional to 2,981.40, 4,111.32 and 2,318.01 is: 3,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.40 : 4,111.32 = 2,318.01 : x
  2. Step 2: Convert to fraction form
    2,981.40/4,111.32 = 2,318.01/x
  3. Step 3: Cross multiply
    2,981.40x = 4,111.32 × 2,318.01
  4. Step 4: Simplify right side
    2,981.40x = 9,530,080.87
  5. Step 5: Solve for x
    x = 9,530,080.87/2,981.40
  6. Step 6: Final answer
    x = 3,196.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.