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Finding the Fourth Proportional to 1,042.75, 1,564.22 and 273.25

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Solution

The fourth proportional to 1,042.75, 1,564.22 and 273.25 is: 409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.75 : 1,564.22 = 273.25 : x
  2. Step 2: Convert to fraction form
    1,042.75/1,564.22 = 273.25/x
  3. Step 3: Cross multiply
    1,042.75x = 1,564.22 × 273.25
  4. Step 4: Simplify right side
    1,042.75x = 427,423.12
  5. Step 5: Solve for x
    x = 427,423.12/1,042.75
  6. Step 6: Final answer
    x = 409.90

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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.