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Finding the Fourth Proportional to 393.65, 543.45 and 362.42

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Solution

The fourth proportional to 393.65, 543.45 and 362.42 is: 500.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.65 : 543.45 = 362.42 : x
  2. Step 2: Convert to fraction form
    393.65/543.45 = 362.42/x
  3. Step 3: Cross multiply
    393.65x = 543.45 × 362.42
  4. Step 4: Simplify right side
    393.65x = 196,957.15
  5. Step 5: Solve for x
    x = 196,957.15/393.65
  6. Step 6: Final answer
    x = 500.34

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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.