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Finding the Fourth Proportional to 521.80, 782.46 and 359.56

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Solution

The fourth proportional to 521.80, 782.46 and 359.56 is: 539.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.80 : 782.46 = 359.56 : x
  2. Step 2: Convert to fraction form
    521.80/782.46 = 359.56/x
  3. Step 3: Cross multiply
    521.80x = 782.46 × 359.56
  4. Step 4: Simplify right side
    521.80x = 281,341.32
  5. Step 5: Solve for x
    x = 281,341.32/521.80
  6. Step 6: Final answer
    x = 539.17

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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.