Home / 2,780.31-3,834.78-1,717.57

Finding the Fourth Proportional to 2,780.31, 3,834.78 and 1,717.57

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Solution

The fourth proportional to 2,780.31, 3,834.78 and 1,717.57 is: 2,368.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.31 : 3,834.78 = 1,717.57 : x
  2. Step 2: Convert to fraction form
    2,780.31/3,834.78 = 1,717.57/x
  3. Step 3: Cross multiply
    2,780.31x = 3,834.78 × 1,717.57
  4. Step 4: Simplify right side
    2,780.31x = 6,586,503.08
  5. Step 5: Solve for x
    x = 6,586,503.08/2,780.31
  6. Step 6: Final answer
    x = 2,368.98

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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.