Home / 1,851.47-2,553.37-1,221.56

Finding the Fourth Proportional to 1,851.47, 2,553.37 and 1,221.56

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Solution

The fourth proportional to 1,851.47, 2,553.37 and 1,221.56 is: 1,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.47 : 2,553.37 = 1,221.56 : x
  2. Step 2: Convert to fraction form
    1,851.47/2,553.37 = 1,221.56/x
  3. Step 3: Cross multiply
    1,851.47x = 2,553.37 × 1,221.56
  4. Step 4: Simplify right side
    1,851.47x = 3,119,078.84
  5. Step 5: Solve for x
    x = 3,119,078.84/1,851.47
  6. Step 6: Final answer
    x = 1,684.65

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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.