Home / 2,121.86-2,928.09-1,177.70

Finding the Fourth Proportional to 2,121.86, 2,928.09 and 1,177.70

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Solution

The fourth proportional to 2,121.86, 2,928.09 and 1,177.70 is: 1,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.86 : 2,928.09 = 1,177.70 : x
  2. Step 2: Convert to fraction form
    2,121.86/2,928.09 = 1,177.70/x
  3. Step 3: Cross multiply
    2,121.86x = 2,928.09 × 1,177.70
  4. Step 4: Simplify right side
    2,121.86x = 3,448,402.60
  5. Step 5: Solve for x
    x = 3,448,402.60/2,121.86
  6. Step 6: Final answer
    x = 1,625.18

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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.