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Finding the Fourth Proportional to 479.19, 661.39 and 304.50

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Solution

The fourth proportional to 479.19, 661.39 and 304.50 is: 420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.19 : 661.39 = 304.50 : x
  2. Step 2: Convert to fraction form
    479.19/661.39 = 304.50/x
  3. Step 3: Cross multiply
    479.19x = 661.39 × 304.50
  4. Step 4: Simplify right side
    479.19x = 201,392.49
  5. Step 5: Solve for x
    x = 201,392.49/479.19
  6. Step 6: Final answer
    x = 420.28

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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.