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Finding the Fourth Proportional to 562.21, 842.73 and 215.45

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Solution

The fourth proportional to 562.21, 842.73 and 215.45 is: 322.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.21 : 842.73 = 215.45 : x
  2. Step 2: Convert to fraction form
    562.21/842.73 = 215.45/x
  3. Step 3: Cross multiply
    562.21x = 842.73 × 215.45
  4. Step 4: Simplify right side
    562.21x = 181,561.96
  5. Step 5: Solve for x
    x = 181,561.96/562.21
  6. Step 6: Final answer
    x = 322.95

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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.