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Finding the Fourth Proportional to 865.55, 1,194.62 and 533.90

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Solution

The fourth proportional to 865.55, 1,194.62 and 533.90 is: 736.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.55 : 1,194.62 = 533.90 : x
  2. Step 2: Convert to fraction form
    865.55/1,194.62 = 533.90/x
  3. Step 3: Cross multiply
    865.55x = 1,194.62 × 533.90
  4. Step 4: Simplify right side
    865.55x = 637,798.98
  5. Step 5: Solve for x
    x = 637,798.98/865.55
  6. Step 6: Final answer
    x = 736.88

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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.