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Finding the Fourth Proportional to 407.75, 562.70 and 233.10

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Solution

The fourth proportional to 407.75, 562.70 and 233.10 is: 321.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.75 : 562.70 = 233.10 : x
  2. Step 2: Convert to fraction form
    407.75/562.70 = 233.10/x
  3. Step 3: Cross multiply
    407.75x = 562.70 × 233.10
  4. Step 4: Simplify right side
    407.75x = 131,164.20
  5. Step 5: Solve for x
    x = 131,164.20/407.75
  6. Step 6: Final answer
    x = 321.68

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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.