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Finding the Fourth Proportional to 386.34, 576.70 and 357.42

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Solution

The fourth proportional to 386.34, 576.70 and 357.42 is: 533.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.34 : 576.70 = 357.42 : x
  2. Step 2: Convert to fraction form
    386.34/576.70 = 357.42/x
  3. Step 3: Cross multiply
    386.34x = 576.70 × 357.42
  4. Step 4: Simplify right side
    386.34x = 206,124.11
  5. Step 5: Solve for x
    x = 206,124.11/386.34
  6. Step 6: Final answer
    x = 533.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.