Home / 2,121.79-2,928.06-1,177.55

Finding the Fourth Proportional to 2,121.79, 2,928.06 and 1,177.55

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Solution

The fourth proportional to 2,121.79, 2,928.06 and 1,177.55 is: 1,625.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.79 : 2,928.06 = 1,177.55 : x
  2. Step 2: Convert to fraction form
    2,121.79/2,928.06 = 1,177.55/x
  3. Step 3: Cross multiply
    2,121.79x = 2,928.06 × 1,177.55
  4. Step 4: Simplify right side
    2,121.79x = 3,447,944.37
  5. Step 5: Solve for x
    x = 3,447,944.37/2,121.79
  6. Step 6: Final answer
    x = 1,625.02

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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.