Home / 1,236.11-1,705.46-1,117.71

Finding the Fourth Proportional to 1,236.11, 1,705.46 and 1,117.71

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Solution

The fourth proportional to 1,236.11, 1,705.46 and 1,117.71 is: 1,542.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.11 : 1,705.46 = 1,117.71 : x
  2. Step 2: Convert to fraction form
    1,236.11/1,705.46 = 1,117.71/x
  3. Step 3: Cross multiply
    1,236.11x = 1,705.46 × 1,117.71
  4. Step 4: Simplify right side
    1,236.11x = 1,906,204.11
  5. Step 5: Solve for x
    x = 1,906,204.11/1,236.11
  6. Step 6: Final answer
    x = 1,542.11

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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.