Home / 1,645.12-2,270.46-981.97

Finding the Fourth Proportional to 1,645.12, 2,270.46 and 981.97

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Solution

The fourth proportional to 1,645.12, 2,270.46 and 981.97 is: 1,355.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.12 : 2,270.46 = 981.97 : x
  2. Step 2: Convert to fraction form
    1,645.12/2,270.46 = 981.97/x
  3. Step 3: Cross multiply
    1,645.12x = 2,270.46 × 981.97
  4. Step 4: Simplify right side
    1,645.12x = 2,229,523.61
  5. Step 5: Solve for x
    x = 2,229,523.61/1,645.12
  6. Step 6: Final answer
    x = 1,355.23

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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.