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Finding the Fourth Proportional to 407.75, 562.56 and 242.02

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Solution

The fourth proportional to 407.75, 562.56 and 242.02 is: 333.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.75 : 562.56 = 242.02 : x
  2. Step 2: Convert to fraction form
    407.75/562.56 = 242.02/x
  3. Step 3: Cross multiply
    407.75x = 562.56 × 242.02
  4. Step 4: Simplify right side
    407.75x = 136,147.96
  5. Step 5: Solve for x
    x = 136,147.96/407.75
  6. Step 6: Final answer
    x = 333.90

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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.