Home / 2,121.77-2,928.05-1,177.58

Finding the Fourth Proportional to 2,121.77, 2,928.05 and 1,177.58

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Solution

The fourth proportional to 2,121.77, 2,928.05 and 1,177.58 is: 1,625.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.77 : 2,928.05 = 1,177.58 : x
  2. Step 2: Convert to fraction form
    2,121.77/2,928.05 = 1,177.58/x
  3. Step 3: Cross multiply
    2,121.77x = 2,928.05 × 1,177.58
  4. Step 4: Simplify right side
    2,121.77x = 3,447,992.59
  5. Step 5: Solve for x
    x = 3,447,992.59/2,121.77
  6. Step 6: Final answer
    x = 1,625.06

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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.