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Finding the Fourth Proportional to 372.19, 513.61 and 206.40

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Solution

The fourth proportional to 372.19, 513.61 and 206.40 is: 284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.19 : 513.61 = 206.40 : x
  2. Step 2: Convert to fraction form
    372.19/513.61 = 206.40/x
  3. Step 3: Cross multiply
    372.19x = 513.61 × 206.40
  4. Step 4: Simplify right side
    372.19x = 106,009.10
  5. Step 5: Solve for x
    x = 106,009.10/372.19
  6. Step 6: Final answer
    x = 284.83

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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.