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Finding the Fourth Proportional to 521.35, 782.24 and 228.70

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Solution

The fourth proportional to 521.35, 782.24 and 228.70 is: 343.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.35 : 782.24 = 228.70 : x
  2. Step 2: Convert to fraction form
    521.35/782.24 = 228.70/x
  3. Step 3: Cross multiply
    521.35x = 782.24 × 228.70
  4. Step 4: Simplify right side
    521.35x = 178,900.01
  5. Step 5: Solve for x
    x = 178,900.01/521.35
  6. Step 6: Final answer
    x = 343.15

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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.