Home / 2,121.20-2,923.80-1,654.64

Finding the Fourth Proportional to 2,121.20, 2,923.80 and 1,654.64

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Solution

The fourth proportional to 2,121.20, 2,923.80 and 1,654.64 is: 2,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.20 : 2,923.80 = 1,654.64 : x
  2. Step 2: Convert to fraction form
    2,121.20/2,923.80 = 1,654.64/x
  3. Step 3: Cross multiply
    2,121.20x = 2,923.80 × 1,654.64
  4. Step 4: Simplify right side
    2,121.20x = 4,837,836.43
  5. Step 5: Solve for x
    x = 4,837,836.43/2,121.20
  6. Step 6: Final answer
    x = 2,280.71

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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.