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Finding the Fourth Proportional to 1,998.70, 2,756.34 and 1,252.42

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Solution

The fourth proportional to 1,998.70, 2,756.34 and 1,252.42 is: 1,727.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.70 : 2,756.34 = 1,252.42 : x
  2. Step 2: Convert to fraction form
    1,998.70/2,756.34 = 1,252.42/x
  3. Step 3: Cross multiply
    1,998.70x = 2,756.34 × 1,252.42
  4. Step 4: Simplify right side
    1,998.70x = 3,452,095.34
  5. Step 5: Solve for x
    x = 3,452,095.34/1,998.70
  6. Step 6: Final answer
    x = 1,727.17

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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.