Home / 1,335.21-2,001.60-1,131.09

Finding the Fourth Proportional to 1,335.21, 2,001.60 and 1,131.09

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Solution

The fourth proportional to 1,335.21, 2,001.60 and 1,131.09 is: 1,695.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.21 : 2,001.60 = 1,131.09 : x
  2. Step 2: Convert to fraction form
    1,335.21/2,001.60 = 1,131.09/x
  3. Step 3: Cross multiply
    1,335.21x = 2,001.60 × 1,131.09
  4. Step 4: Simplify right side
    1,335.21x = 2,263,989.74
  5. Step 5: Solve for x
    x = 2,263,989.74/1,335.21
  6. Step 6: Final answer
    x = 1,695.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.