Home / 2,221.13-3,065.11-1,276.89

Finding the Fourth Proportional to 2,221.13, 3,065.11 and 1,276.89

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Solution

The fourth proportional to 2,221.13, 3,065.11 and 1,276.89 is: 1,762.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.13 : 3,065.11 = 1,276.89 : x
  2. Step 2: Convert to fraction form
    2,221.13/3,065.11 = 1,276.89/x
  3. Step 3: Cross multiply
    2,221.13x = 3,065.11 × 1,276.89
  4. Step 4: Simplify right side
    2,221.13x = 3,913,816.61
  5. Step 5: Solve for x
    x = 3,913,816.61/2,221.13
  6. Step 6: Final answer
    x = 1,762.09

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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.