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Finding the Fourth Proportional to 865.14, 1,193.84 and 511.05

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Solution

The fourth proportional to 865.14, 1,193.84 and 511.05 is: 705.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.14 : 1,193.84 = 511.05 : x
  2. Step 2: Convert to fraction form
    865.14/1,193.84 = 511.05/x
  3. Step 3: Cross multiply
    865.14x = 1,193.84 × 511.05
  4. Step 4: Simplify right side
    865.14x = 610,111.93
  5. Step 5: Solve for x
    x = 610,111.93/865.14
  6. Step 6: Final answer
    x = 705.22

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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.