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Finding the Fourth Proportional to 282, 422.28 and 210

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Solution

The fourth proportional to 282, 422.28 and 210 is: 314.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    282 : 422.28 = 210 : x
  2. Step 2: Convert to fraction form
    282/422.28 = 210/x
  3. Step 3: Cross multiply
    282x = 422.28 × 210
  4. Step 4: Simplify right side
    282x = 88,678.80
  5. Step 5: Solve for x
    x = 88,678.80/282
  6. Step 6: Final answer
    x = 314.46

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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.