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Finding the Fourth Proportional to 479.58, 661.83 and 374.79

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Solution

The fourth proportional to 479.58, 661.83 and 374.79 is: 517.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.58 : 661.83 = 374.79 : x
  2. Step 2: Convert to fraction form
    479.58/661.83 = 374.79/x
  3. Step 3: Cross multiply
    479.58x = 661.83 × 374.79
  4. Step 4: Simplify right side
    479.58x = 248,047.27
  5. Step 5: Solve for x
    x = 248,047.27/479.58
  6. Step 6: Final answer
    x = 517.22

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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.