Home / 2,221.12-3,065.31-1,277.07

Finding the Fourth Proportional to 2,221.12, 3,065.31 and 1,277.07

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Solution

The fourth proportional to 2,221.12, 3,065.31 and 1,277.07 is: 1,762.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.12 : 3,065.31 = 1,277.07 : x
  2. Step 2: Convert to fraction form
    2,221.12/3,065.31 = 1,277.07/x
  3. Step 3: Cross multiply
    2,221.12x = 3,065.31 × 1,277.07
  4. Step 4: Simplify right side
    2,221.12x = 3,914,615.44
  5. Step 5: Solve for x
    x = 3,914,615.44/2,221.12
  6. Step 6: Final answer
    x = 1,762.45

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1.5x scale

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.