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Finding the Fourth Proportional to 865.66, 1,194.60 and 511.58

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Solution

The fourth proportional to 865.66, 1,194.60 and 511.58 is: 705.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.66 : 1,194.60 = 511.58 : x
  2. Step 2: Convert to fraction form
    865.66/1,194.60 = 511.58/x
  3. Step 3: Cross multiply
    865.66x = 1,194.60 × 511.58
  4. Step 4: Simplify right side
    865.66x = 611,133.47
  5. Step 5: Solve for x
    x = 611,133.47/865.66
  6. Step 6: Final answer
    x = 705.98

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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.