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Finding the Fourth Proportional to 283.34, 390.61 and 189.92

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Solution

The fourth proportional to 283.34, 390.61 and 189.92 is: 261.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.34 : 390.61 = 189.92 : x
  2. Step 2: Convert to fraction form
    283.34/390.61 = 189.92/x
  3. Step 3: Cross multiply
    283.34x = 390.61 × 189.92
  4. Step 4: Simplify right side
    283.34x = 74,184.65
  5. Step 5: Solve for x
    x = 74,184.65/283.34
  6. Step 6: Final answer
    x = 261.82

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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.