Home / 2,313.68-3,189.58-1,428.98

Finding the Fourth Proportional to 2,313.68, 3,189.58 and 1,428.98

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Solution

The fourth proportional to 2,313.68, 3,189.58 and 1,428.98 is: 1,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.68 : 3,189.58 = 1,428.98 : x
  2. Step 2: Convert to fraction form
    2,313.68/3,189.58 = 1,428.98/x
  3. Step 3: Cross multiply
    2,313.68x = 3,189.58 × 1,428.98
  4. Step 4: Simplify right side
    2,313.68x = 4,557,826.51
  5. Step 5: Solve for x
    x = 4,557,826.51/2,313.68
  6. Step 6: Final answer
    x = 1,969.95

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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.