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Finding the Fourth Proportional to 521.70, 782.60 and 197.08

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Solution

The fourth proportional to 521.70, 782.60 and 197.08 is: 295.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.70 : 782.60 = 197.08 : x
  2. Step 2: Convert to fraction form
    521.70/782.60 = 197.08/x
  3. Step 3: Cross multiply
    521.70x = 782.60 × 197.08
  4. Step 4: Simplify right side
    521.70x = 154,234.81
  5. Step 5: Solve for x
    x = 154,234.81/521.70
  6. Step 6: Final answer
    x = 295.64

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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.