Home / 1,680.36-2,318.30-981.73

Finding the Fourth Proportional to 1,680.36, 2,318.30 and 981.73

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Solution

The fourth proportional to 1,680.36, 2,318.30 and 981.73 is: 1,354.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.36 : 2,318.30 = 981.73 : x
  2. Step 2: Convert to fraction form
    1,680.36/2,318.30 = 981.73/x
  3. Step 3: Cross multiply
    1,680.36x = 2,318.30 × 981.73
  4. Step 4: Simplify right side
    1,680.36x = 2,275,946.33
  5. Step 5: Solve for x
    x = 2,275,946.33/1,680.36
  6. Step 6: Final answer
    x = 1,354.44

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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.