Home / 1,815.14-2,709.56-1,679.78

Finding the Fourth Proportional to 1,815.14, 2,709.56 and 1,679.78

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Solution

The fourth proportional to 1,815.14, 2,709.56 and 1,679.78 is: 2,507.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.14 : 2,709.56 = 1,679.78 : x
  2. Step 2: Convert to fraction form
    1,815.14/2,709.56 = 1,679.78/x
  3. Step 3: Cross multiply
    1,815.14x = 2,709.56 × 1,679.78
  4. Step 4: Simplify right side
    1,815.14x = 4,551,464.70
  5. Step 5: Solve for x
    x = 4,551,464.70/1,815.14
  6. Step 6: Final answer
    x = 2,507.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.