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Finding the Fourth Proportional to 1,250.78, 1,725.27 and 858.02

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Solution

The fourth proportional to 1,250.78, 1,725.27 and 858.02 is: 1,183.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.78 : 1,725.27 = 858.02 : x
  2. Step 2: Convert to fraction form
    1,250.78/1,725.27 = 858.02/x
  3. Step 3: Cross multiply
    1,250.78x = 1,725.27 × 858.02
  4. Step 4: Simplify right side
    1,250.78x = 1,480,316.17
  5. Step 5: Solve for x
    x = 1,480,316.17/1,250.78
  6. Step 6: Final answer
    x = 1,183.51

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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.