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Finding the Fourth Proportional to 602.76, 902.02 and 438.42

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Solution

The fourth proportional to 602.76, 902.02 and 438.42 is: 656.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.76 : 902.02 = 438.42 : x
  2. Step 2: Convert to fraction form
    602.76/902.02 = 438.42/x
  3. Step 3: Cross multiply
    602.76x = 902.02 × 438.42
  4. Step 4: Simplify right side
    602.76x = 395,463.61
  5. Step 5: Solve for x
    x = 395,463.61/602.76
  6. Step 6: Final answer
    x = 656.09

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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.