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Finding the Fourth Proportional to 818.66, 1,227.56 and 356.19

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Solution

The fourth proportional to 818.66, 1,227.56 and 356.19 is: 534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.66 : 1,227.56 = 356.19 : x
  2. Step 2: Convert to fraction form
    818.66/1,227.56 = 356.19/x
  3. Step 3: Cross multiply
    818.66x = 1,227.56 × 356.19
  4. Step 4: Simplify right side
    818.66x = 437,242.82
  5. Step 5: Solve for x
    x = 437,242.82/818.66
  6. Step 6: Final answer
    x = 534.10

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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.