Home / 3,191.66-4,785.40-1,111.50

Finding the Fourth Proportional to 3,191.66, 4,785.40 and 1,111.50

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Solution

The fourth proportional to 3,191.66, 4,785.40 and 1,111.50 is: 1,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.66 : 4,785.40 = 1,111.50 : x
  2. Step 2: Convert to fraction form
    3,191.66/4,785.40 = 1,111.50/x
  3. Step 3: Cross multiply
    3,191.66x = 4,785.40 × 1,111.50
  4. Step 4: Simplify right side
    3,191.66x = 5,318,972.10
  5. Step 5: Solve for x
    x = 5,318,972.10/3,191.66
  6. Step 6: Final answer
    x = 1,666.52

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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.