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Finding the Fourth Proportional to 548, 821.60 and 304.48

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Solution

The fourth proportional to 548, 821.60 and 304.48 is: 456.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    548 : 821.60 = 304.48 : x
  2. Step 2: Convert to fraction form
    548/821.60 = 304.48/x
  3. Step 3: Cross multiply
    548x = 821.60 × 304.48
  4. Step 4: Simplify right side
    548x = 250,160.77
  5. Step 5: Solve for x
    x = 250,160.77/548
  6. Step 6: Final answer
    x = 456.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.