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Finding the Fourth Proportional to 438.42, 657.64 and 301.05

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Solution

The fourth proportional to 438.42, 657.64 and 301.05 is: 451.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.42 : 657.64 = 301.05 : x
  2. Step 2: Convert to fraction form
    438.42/657.64 = 301.05/x
  3. Step 3: Cross multiply
    438.42x = 657.64 × 301.05
  4. Step 4: Simplify right side
    438.42x = 197,982.52
  5. Step 5: Solve for x
    x = 197,982.52/438.42
  6. Step 6: Final answer
    x = 451.58

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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.