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Finding the Fourth Proportional to 383.65, 575.47 and 140.17

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Solution

The fourth proportional to 383.65, 575.47 and 140.17 is: 210.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.65 : 575.47 = 140.17 : x
  2. Step 2: Convert to fraction form
    383.65/575.47 = 140.17/x
  3. Step 3: Cross multiply
    383.65x = 575.47 × 140.17
  4. Step 4: Simplify right side
    383.65x = 80,663.63
  5. Step 5: Solve for x
    x = 80,663.63/383.65
  6. Step 6: Final answer
    x = 210.26

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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.