Home / 3,390.31-5,084.78-2,140.53

Finding the Fourth Proportional to 3,390.31, 5,084.78 and 2,140.53

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Solution

The fourth proportional to 3,390.31, 5,084.78 and 2,140.53 is: 3,210.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.31 : 5,084.78 = 2,140.53 : x
  2. Step 2: Convert to fraction form
    3,390.31/5,084.78 = 2,140.53/x
  3. Step 3: Cross multiply
    3,390.31x = 5,084.78 × 2,140.53
  4. Step 4: Simplify right side
    3,390.31x = 10,884,094.36
  5. Step 5: Solve for x
    x = 10,884,094.36/3,390.31
  6. Step 6: Final answer
    x = 3,210.36

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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.