Home / 1,680.76-2,319.06-982.36

Finding the Fourth Proportional to 1,680.76, 2,319.06 and 982.36

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Solution

The fourth proportional to 1,680.76, 2,319.06 and 982.36 is: 1,355.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.76 : 2,319.06 = 982.36 : x
  2. Step 2: Convert to fraction form
    1,680.76/2,319.06 = 982.36/x
  3. Step 3: Cross multiply
    1,680.76x = 2,319.06 × 982.36
  4. Step 4: Simplify right side
    1,680.76x = 2,278,151.78
  5. Step 5: Solve for x
    x = 2,278,151.78/1,680.76
  6. Step 6: Final answer
    x = 1,355.43

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Double scale
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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.