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Finding the Fourth Proportional to 438.21, 657.11 and 301.32

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Solution

The fourth proportional to 438.21, 657.11 and 301.32 is: 451.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.21 : 657.11 = 301.32 : x
  2. Step 2: Convert to fraction form
    438.21/657.11 = 301.32/x
  3. Step 3: Cross multiply
    438.21x = 657.11 × 301.32
  4. Step 4: Simplify right side
    438.21x = 198,001.14
  5. Step 5: Solve for x
    x = 198,001.14/438.21
  6. Step 6: Final answer
    x = 451.84

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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.