Home / 3,191.47-4,786.93-1,111.12

Finding the Fourth Proportional to 3,191.47, 4,786.93 and 1,111.12

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Solution

The fourth proportional to 3,191.47, 4,786.93 and 1,111.12 is: 1,666.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.47 : 4,786.93 = 1,111.12 : x
  2. Step 2: Convert to fraction form
    3,191.47/4,786.93 = 1,111.12/x
  3. Step 3: Cross multiply
    3,191.47x = 4,786.93 × 1,111.12
  4. Step 4: Simplify right side
    3,191.47x = 5,318,853.66
  5. Step 5: Solve for x
    x = 5,318,853.66/3,191.47
  6. Step 6: Final answer
    x = 1,666.58

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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.