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Finding the Fourth Proportional to 865.64, 1,194.27 and 511.48

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Solution

The fourth proportional to 865.64, 1,194.27 and 511.48 is: 705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.64 : 1,194.27 = 511.48 : x
  2. Step 2: Convert to fraction form
    865.64/1,194.27 = 511.48/x
  3. Step 3: Cross multiply
    865.64x = 1,194.27 × 511.48
  4. Step 4: Simplify right side
    865.64x = 610,846.71
  5. Step 5: Solve for x
    x = 610,846.71/865.64
  6. Step 6: Final answer
    x = 705.66

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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.