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Finding the Fourth Proportional to 1,997.60, 2,995.58 and 698.76

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Solution

The fourth proportional to 1,997.60, 2,995.58 and 698.76 is: 1,047.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.60 : 2,995.58 = 698.76 : x
  2. Step 2: Convert to fraction form
    1,997.60/2,995.58 = 698.76/x
  3. Step 3: Cross multiply
    1,997.60x = 2,995.58 × 698.76
  4. Step 4: Simplify right side
    1,997.60x = 2,093,191.48
  5. Step 5: Solve for x
    x = 2,093,191.48/1,997.60
  6. Step 6: Final answer
    x = 1,047.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.