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Finding the Fourth Proportional to 407.36, 562.16 and 220.85

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Solution

The fourth proportional to 407.36, 562.16 and 220.85 is: 304.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.36 : 562.16 = 220.85 : x
  2. Step 2: Convert to fraction form
    407.36/562.16 = 220.85/x
  3. Step 3: Cross multiply
    407.36x = 562.16 × 220.85
  4. Step 4: Simplify right side
    407.36x = 124,151.93
  5. Step 5: Solve for x
    x = 124,151.93/407.36
  6. Step 6: Final answer
    x = 304.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.