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Finding the Fourth Proportional to 2,145.84, 2,960.84 and 1,201.56

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Solution

The fourth proportional to 2,145.84, 2,960.84 and 1,201.56 is: 1,657.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.84 : 2,960.84 = 1,201.56 : x
  2. Step 2: Convert to fraction form
    2,145.84/2,960.84 = 1,201.56/x
  3. Step 3: Cross multiply
    2,145.84x = 2,960.84 × 1,201.56
  4. Step 4: Simplify right side
    2,145.84x = 3,557,626.91
  5. Step 5: Solve for x
    x = 3,557,626.91/2,145.84
  6. Step 6: Final answer
    x = 1,657.92

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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.