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Finding the Fourth Proportional to 479.33, 661.74 and 292.86

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Solution

The fourth proportional to 479.33, 661.74 and 292.86 is: 404.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.33 : 661.74 = 292.86 : x
  2. Step 2: Convert to fraction form
    479.33/661.74 = 292.86/x
  3. Step 3: Cross multiply
    479.33x = 661.74 × 292.86
  4. Step 4: Simplify right side
    479.33x = 193,795.71
  5. Step 5: Solve for x
    x = 193,795.71/479.33
  6. Step 6: Final answer
    x = 404.31

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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.