Home / 2,129.90-2,940.72-1,631.66

Finding the Fourth Proportional to 2,129.90, 2,940.72 and 1,631.66

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Solution

The fourth proportional to 2,129.90, 2,940.72 and 1,631.66 is: 2,252.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.90 : 2,940.72 = 1,631.66 : x
  2. Step 2: Convert to fraction form
    2,129.90/2,940.72 = 1,631.66/x
  3. Step 3: Cross multiply
    2,129.90x = 2,940.72 × 1,631.66
  4. Step 4: Simplify right side
    2,129.90x = 4,798,255.20
  5. Step 5: Solve for x
    x = 4,798,255.20/2,129.90
  6. Step 6: Final answer
    x = 2,252.81

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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.