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Finding the Fourth Proportional to 818.12, 1,226.39 and 524.79

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Solution

The fourth proportional to 818.12, 1,226.39 and 524.79 is: 786.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.12 : 1,226.39 = 524.79 : x
  2. Step 2: Convert to fraction form
    818.12/1,226.39 = 524.79/x
  3. Step 3: Cross multiply
    818.12x = 1,226.39 × 524.79
  4. Step 4: Simplify right side
    818.12x = 643,597.21
  5. Step 5: Solve for x
    x = 643,597.21/818.12
  6. Step 6: Final answer
    x = 786.68

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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.