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Finding the Fourth Proportional to 602.97, 904.20 and 212.87

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Solution

The fourth proportional to 602.97, 904.20 and 212.87 is: 319.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.97 : 904.20 = 212.87 : x
  2. Step 2: Convert to fraction form
    602.97/904.20 = 212.87/x
  3. Step 3: Cross multiply
    602.97x = 904.20 × 212.87
  4. Step 4: Simplify right side
    602.97x = 192,472.53
  5. Step 5: Solve for x
    x = 192,472.53/602.97
  6. Step 6: Final answer
    x = 319.21

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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.