Home / 1,977.07-2,728.35-1,191.16

Finding the Fourth Proportional to 1,977.07, 2,728.35 and 1,191.16

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Solution

The fourth proportional to 1,977.07, 2,728.35 and 1,191.16 is: 1,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.07 : 2,728.35 = 1,191.16 : x
  2. Step 2: Convert to fraction form
    1,977.07/2,728.35 = 1,191.16/x
  3. Step 3: Cross multiply
    1,977.07x = 2,728.35 × 1,191.16
  4. Step 4: Simplify right side
    1,977.07x = 3,249,901.39
  5. Step 5: Solve for x
    x = 3,249,901.39/1,977.07
  6. Step 6: Final answer
    x = 1,643.80

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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.