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Finding the Fourth Proportional to 562.45, 843.10 and 215.70

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Solution

The fourth proportional to 562.45, 843.10 and 215.70 is: 323.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.45 : 843.10 = 215.70 : x
  2. Step 2: Convert to fraction form
    562.45/843.10 = 215.70/x
  3. Step 3: Cross multiply
    562.45x = 843.10 × 215.70
  4. Step 4: Simplify right side
    562.45x = 181,852.97
  5. Step 5: Solve for x
    x = 181,852.97/562.45
  6. Step 6: Final answer
    x = 323.32

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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.