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Finding the Fourth Proportional to 479.31, 661.23 and 292.65

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Solution

The fourth proportional to 479.31, 661.23 and 292.65 is: 403.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.31 : 661.23 = 292.65 : x
  2. Step 2: Convert to fraction form
    479.31/661.23 = 292.65/x
  3. Step 3: Cross multiply
    479.31x = 661.23 × 292.65
  4. Step 4: Simplify right side
    479.31x = 193,508.96
  5. Step 5: Solve for x
    x = 193,508.96/479.31
  6. Step 6: Final answer
    x = 403.72

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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.