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Finding the Fourth Proportional to 438.28, 657.43 and 335.75

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Solution

The fourth proportional to 438.28, 657.43 and 335.75 is: 503.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.28 : 657.43 = 335.75 : x
  2. Step 2: Convert to fraction form
    438.28/657.43 = 335.75/x
  3. Step 3: Cross multiply
    438.28x = 657.43 × 335.75
  4. Step 4: Simplify right side
    438.28x = 220,728.00
  5. Step 5: Solve for x
    x = 220,728.00/438.28
  6. Step 6: Final answer
    x = 503.63

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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.