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Finding the Fourth Proportional to 369.29, 509.64 and 211.95

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Solution

The fourth proportional to 369.29, 509.64 and 211.95 is: 292.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.29 : 509.64 = 211.95 : x
  2. Step 2: Convert to fraction form
    369.29/509.64 = 211.95/x
  3. Step 3: Cross multiply
    369.29x = 509.64 × 211.95
  4. Step 4: Simplify right side
    369.29x = 108,018.20
  5. Step 5: Solve for x
    x = 108,018.20/369.29
  6. Step 6: Final answer
    x = 292.51

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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.