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Finding the Fourth Proportional to 1,998.57, 2,998.04 and 959.07

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Solution

The fourth proportional to 1,998.57, 2,998.04 and 959.07 is: 1,438.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.57 : 2,998.04 = 959.07 : x
  2. Step 2: Convert to fraction form
    1,998.57/2,998.04 = 959.07/x
  3. Step 3: Cross multiply
    1,998.57x = 2,998.04 × 959.07
  4. Step 4: Simplify right side
    1,998.57x = 2,875,330.22
  5. Step 5: Solve for x
    x = 2,875,330.22/1,998.57
  6. Step 6: Final answer
    x = 1,438.69

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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.