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Finding the Fourth Proportional to 307.92, 425.04 and 220.56

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Solution

The fourth proportional to 307.92, 425.04 and 220.56 is: 304.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.92 : 425.04 = 220.56 : x
  2. Step 2: Convert to fraction form
    307.92/425.04 = 220.56/x
  3. Step 3: Cross multiply
    307.92x = 425.04 × 220.56
  4. Step 4: Simplify right side
    307.92x = 93,746.82
  5. Step 5: Solve for x
    x = 93,746.82/307.92
  6. Step 6: Final answer
    x = 304.45

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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.