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Finding the Fourth Proportional to 521.50, 782.08 and 174.74

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Solution

The fourth proportional to 521.50, 782.08 and 174.74 is: 262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.50 : 782.08 = 174.74 : x
  2. Step 2: Convert to fraction form
    521.50/782.08 = 174.74/x
  3. Step 3: Cross multiply
    521.50x = 782.08 × 174.74
  4. Step 4: Simplify right side
    521.50x = 136,660.66
  5. Step 5: Solve for x
    x = 136,660.66/521.50
  6. Step 6: Final answer
    x = 262.05

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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.