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Finding the Fourth Proportional to 383.49, 575.35 and 140.05

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Solution

The fourth proportional to 383.49, 575.35 and 140.05 is: 210.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.49 : 575.35 = 140.05 : x
  2. Step 2: Convert to fraction form
    383.49/575.35 = 140.05/x
  3. Step 3: Cross multiply
    383.49x = 575.35 × 140.05
  4. Step 4: Simplify right side
    383.49x = 80,577.77
  5. Step 5: Solve for x
    x = 80,577.77/383.49
  6. Step 6: Final answer
    x = 210.12

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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.