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Finding the Fourth Proportional to 442.68, 611.64 and 343.50

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Solution

The fourth proportional to 442.68, 611.64 and 343.50 is: 474.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.68 : 611.64 = 343.50 : x
  2. Step 2: Convert to fraction form
    442.68/611.64 = 343.50/x
  3. Step 3: Cross multiply
    442.68x = 611.64 × 343.50
  4. Step 4: Simplify right side
    442.68x = 210,098.34
  5. Step 5: Solve for x
    x = 210,098.34/442.68
  6. Step 6: Final answer
    x = 474.61

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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.