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Finding the Fourth Proportional to 369.72, 510.21 and 222.39

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Solution

The fourth proportional to 369.72, 510.21 and 222.39 is: 306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.72 : 510.21 = 222.39 : x
  2. Step 2: Convert to fraction form
    369.72/510.21 = 222.39/x
  3. Step 3: Cross multiply
    369.72x = 510.21 × 222.39
  4. Step 4: Simplify right side
    369.72x = 113,465.60
  5. Step 5: Solve for x
    x = 113,465.60/369.72
  6. Step 6: Final answer
    x = 306.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.