Home / 2,940.40-4,057.48-1,681.20

Finding the Fourth Proportional to 2,940.40, 4,057.48 and 1,681.20

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Solution

The fourth proportional to 2,940.40, 4,057.48 and 1,681.20 is: 2,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.40 : 4,057.48 = 1,681.20 : x
  2. Step 2: Convert to fraction form
    2,940.40/4,057.48 = 1,681.20/x
  3. Step 3: Cross multiply
    2,940.40x = 4,057.48 × 1,681.20
  4. Step 4: Simplify right side
    2,940.40x = 6,821,435.38
  5. Step 5: Solve for x
    x = 6,821,435.38/2,940.40
  6. Step 6: Final answer
    x = 2,319.90

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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.