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Finding the Fourth Proportional to 521.95, 782.94 and 156.75

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Solution

The fourth proportional to 521.95, 782.94 and 156.75 is: 235.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.95 : 782.94 = 156.75 : x
  2. Step 2: Convert to fraction form
    521.95/782.94 = 156.75/x
  3. Step 3: Cross multiply
    521.95x = 782.94 × 156.75
  4. Step 4: Simplify right side
    521.95x = 122,725.85
  5. Step 5: Solve for x
    x = 122,725.85/521.95
  6. Step 6: Final answer
    x = 235.13

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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.