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Finding the Fourth Proportional to 385.61, 532.15 and 219.83

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Solution

The fourth proportional to 385.61, 532.15 and 219.83 is: 303.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.61 : 532.15 = 219.83 : x
  2. Step 2: Convert to fraction form
    385.61/532.15 = 219.83/x
  3. Step 3: Cross multiply
    385.61x = 532.15 × 219.83
  4. Step 4: Simplify right side
    385.61x = 116,979.32
  5. Step 5: Solve for x
    x = 116,979.32/385.61
  6. Step 6: Final answer
    x = 303.37

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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.