Home / 2,979.89-4,112.50-1,653.85

Finding the Fourth Proportional to 2,979.89, 4,112.50 and 1,653.85

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Solution

The fourth proportional to 2,979.89, 4,112.50 and 1,653.85 is: 2,282.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.89 : 4,112.50 = 1,653.85 : x
  2. Step 2: Convert to fraction form
    2,979.89/4,112.50 = 1,653.85/x
  3. Step 3: Cross multiply
    2,979.89x = 4,112.50 × 1,653.85
  4. Step 4: Simplify right side
    2,979.89x = 6,801,437.56
  5. Step 5: Solve for x
    x = 6,801,437.56/2,979.89
  6. Step 6: Final answer
    x = 2,282.45

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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.