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Finding the Fourth Proportional to 369.95, 510.31 and 222.49

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Solution

The fourth proportional to 369.95, 510.31 and 222.49 is: 306.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.95 : 510.31 = 222.49 : x
  2. Step 2: Convert to fraction form
    369.95/510.31 = 222.49/x
  3. Step 3: Cross multiply
    369.95x = 510.31 × 222.49
  4. Step 4: Simplify right side
    369.95x = 113,539.79
  5. Step 5: Solve for x
    x = 113,539.79/369.95
  6. Step 6: Final answer
    x = 306.91

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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.