Home / 1,584.80-2,187.08-1,191.12

Finding the Fourth Proportional to 1,584.80, 2,187.08 and 1,191.12

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Solution

The fourth proportional to 1,584.80, 2,187.08 and 1,191.12 is: 1,643.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,584.80 : 2,187.08 = 1,191.12 : x
  2. Step 2: Convert to fraction form
    1,584.80/2,187.08 = 1,191.12/x
  3. Step 3: Cross multiply
    1,584.80x = 2,187.08 × 1,191.12
  4. Step 4: Simplify right side
    1,584.80x = 2,605,074.73
  5. Step 5: Solve for x
    x = 2,605,074.73/1,584.80
  6. Step 6: Final answer
    x = 1,643.79

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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.