Home / 2,780.91-4,171.28-1,858.23

Finding the Fourth Proportional to 2,780.91, 4,171.28 and 1,858.23

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Solution

The fourth proportional to 2,780.91, 4,171.28 and 1,858.23 is: 2,787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.91 : 4,171.28 = 1,858.23 : x
  2. Step 2: Convert to fraction form
    2,780.91/4,171.28 = 1,858.23/x
  3. Step 3: Cross multiply
    2,780.91x = 4,171.28 × 1,858.23
  4. Step 4: Simplify right side
    2,780.91x = 7,751,188.34
  5. Step 5: Solve for x
    x = 7,751,188.34/2,780.91
  6. Step 6: Final answer
    x = 2,787.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.