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Finding the Fourth Proportional to 1,512.65, 2,087.39 and 883.21

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Solution

The fourth proportional to 1,512.65, 2,087.39 and 883.21 is: 1,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.65 : 2,087.39 = 883.21 : x
  2. Step 2: Convert to fraction form
    1,512.65/2,087.39 = 883.21/x
  3. Step 3: Cross multiply
    1,512.65x = 2,087.39 × 883.21
  4. Step 4: Simplify right side
    1,512.65x = 1,843,603.72
  5. Step 5: Solve for x
    x = 1,843,603.72/1,512.65
  6. Step 6: Final answer
    x = 1,218.79

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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.