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Finding the Fourth Proportional to 379.47, 523.63 and 292.20

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Solution

The fourth proportional to 379.47, 523.63 and 292.20 is: 403.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.47 : 523.63 = 292.20 : x
  2. Step 2: Convert to fraction form
    379.47/523.63 = 292.20/x
  3. Step 3: Cross multiply
    379.47x = 523.63 × 292.20
  4. Step 4: Simplify right side
    379.47x = 153,004.69
  5. Step 5: Solve for x
    x = 153,004.69/379.47
  6. Step 6: Final answer
    x = 403.21

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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.