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Finding the Fourth Proportional to 418.34, 576.62 and 383.48

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Solution

The fourth proportional to 418.34, 576.62 and 383.48 is: 528.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.34 : 576.62 = 383.48 : x
  2. Step 2: Convert to fraction form
    418.34/576.62 = 383.48/x
  3. Step 3: Cross multiply
    418.34x = 576.62 × 383.48
  4. Step 4: Simplify right side
    418.34x = 221,122.24
  5. Step 5: Solve for x
    x = 221,122.24/418.34
  6. Step 6: Final answer
    x = 528.57

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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.