Home / 1,977.60-2,728.23-1,191.20

Finding the Fourth Proportional to 1,977.60, 2,728.23 and 1,191.20

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Solution

The fourth proportional to 1,977.60, 2,728.23 and 1,191.20 is: 1,643.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.60 : 2,728.23 = 1,191.20 : x
  2. Step 2: Convert to fraction form
    1,977.60/2,728.23 = 1,191.20/x
  3. Step 3: Cross multiply
    1,977.60x = 2,728.23 × 1,191.20
  4. Step 4: Simplify right side
    1,977.60x = 3,249,853.93
  5. Step 5: Solve for x
    x = 3,249,853.93/1,977.60
  6. Step 6: Final answer
    x = 1,643.33

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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.