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Finding the Fourth Proportional to 521.58, 782.39 and 156.35

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Solution

The fourth proportional to 521.58, 782.39 and 156.35 is: 234.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.58 : 782.39 = 156.35 : x
  2. Step 2: Convert to fraction form
    521.58/782.39 = 156.35/x
  3. Step 3: Cross multiply
    521.58x = 782.39 × 156.35
  4. Step 4: Simplify right side
    521.58x = 122,321.98
  5. Step 5: Solve for x
    x = 122,321.98/521.58
  6. Step 6: Final answer
    x = 234.52

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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.