Home / 2,313.39-3,191.18-1,428.57

Finding the Fourth Proportional to 2,313.39, 3,191.18 and 1,428.57

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Solution

The fourth proportional to 2,313.39, 3,191.18 and 1,428.57 is: 1,970.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.39 : 3,191.18 = 1,428.57 : x
  2. Step 2: Convert to fraction form
    2,313.39/3,191.18 = 1,428.57/x
  3. Step 3: Cross multiply
    2,313.39x = 3,191.18 × 1,428.57
  4. Step 4: Simplify right side
    2,313.39x = 4,558,824.01
  5. Step 5: Solve for x
    x = 4,558,824.01/2,313.39
  6. Step 6: Final answer
    x = 1,970.62

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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.