Home / 2,130.55-2,940.23-1,291.11

Finding the Fourth Proportional to 2,130.55, 2,940.23 and 1,291.11

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Solution

The fourth proportional to 2,130.55, 2,940.23 and 1,291.11 is: 1,781.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.55 : 2,940.23 = 1,291.11 : x
  2. Step 2: Convert to fraction form
    2,130.55/2,940.23 = 1,291.11/x
  3. Step 3: Cross multiply
    2,130.55x = 2,940.23 × 1,291.11
  4. Step 4: Simplify right side
    2,130.55x = 3,796,160.36
  5. Step 5: Solve for x
    x = 3,796,160.36/2,130.55
  6. Step 6: Final answer
    x = 1,781.77

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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.