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Finding the Fourth Proportional to 479.93, 661.51 and 374.81

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Solution

The fourth proportional to 479.93, 661.51 and 374.81 is: 516.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.93 : 661.51 = 374.81 : x
  2. Step 2: Convert to fraction form
    479.93/661.51 = 374.81/x
  3. Step 3: Cross multiply
    479.93x = 661.51 × 374.81
  4. Step 4: Simplify right side
    479.93x = 247,940.56
  5. Step 5: Solve for x
    x = 247,940.56/479.93
  6. Step 6: Final answer
    x = 516.62

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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.