Home / 1,768.40-2,440.28-982.56

Finding the Fourth Proportional to 1,768.40, 2,440.28 and 982.56

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Solution

The fourth proportional to 1,768.40, 2,440.28 and 982.56 is: 1,355.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.40 : 2,440.28 = 982.56 : x
  2. Step 2: Convert to fraction form
    1,768.40/2,440.28 = 982.56/x
  3. Step 3: Cross multiply
    1,768.40x = 2,440.28 × 982.56
  4. Step 4: Simplify right side
    1,768.40x = 2,397,721.52
  5. Step 5: Solve for x
    x = 2,397,721.52/1,768.40
  6. Step 6: Final answer
    x = 1,355.87

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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.