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Finding the Fourth Proportional to 602.45, 903.89 and 212.56

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Solution

The fourth proportional to 602.45, 903.89 and 212.56 is: 318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.45 : 903.89 = 212.56 : x
  2. Step 2: Convert to fraction form
    602.45/903.89 = 212.56/x
  3. Step 3: Cross multiply
    602.45x = 903.89 × 212.56
  4. Step 4: Simplify right side
    602.45x = 192,130.86
  5. Step 5: Solve for x
    x = 192,130.86/602.45
  6. Step 6: Final answer
    x = 318.92

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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.