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Finding the Fourth Proportional to 479.28, 661.17 and 302.46

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Solution

The fourth proportional to 479.28, 661.17 and 302.46 is: 417.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.28 : 661.17 = 302.46 : x
  2. Step 2: Convert to fraction form
    479.28/661.17 = 302.46/x
  3. Step 3: Cross multiply
    479.28x = 661.17 × 302.46
  4. Step 4: Simplify right side
    479.28x = 199,977.48
  5. Step 5: Solve for x
    x = 199,977.48/479.28
  6. Step 6: Final answer
    x = 417.25

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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.