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Finding the Fourth Proportional to 521.44, 782.28 and 156.20

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Solution

The fourth proportional to 521.44, 782.28 and 156.20 is: 234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.44 : 782.28 = 156.20 : x
  2. Step 2: Convert to fraction form
    521.44/782.28 = 156.20/x
  3. Step 3: Cross multiply
    521.44x = 782.28 × 156.20
  4. Step 4: Simplify right side
    521.44x = 122,192.14
  5. Step 5: Solve for x
    x = 122,192.14/521.44
  6. Step 6: Final answer
    x = 234.34

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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.