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Finding the Fourth Proportional to 384.12, 575.84 and 140.84

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Solution

The fourth proportional to 384.12, 575.84 and 140.84 is: 211.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.12 : 575.84 = 140.84 : x
  2. Step 2: Convert to fraction form
    384.12/575.84 = 140.84/x
  3. Step 3: Cross multiply
    384.12x = 575.84 × 140.84
  4. Step 4: Simplify right side
    384.12x = 81,101.31
  5. Step 5: Solve for x
    x = 81,101.31/384.12
  6. Step 6: Final answer
    x = 211.14

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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.