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Finding the Fourth Proportional to 220.48, 304.10 and 137.47

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Solution

The fourth proportional to 220.48, 304.10 and 137.47 is: 189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.48 : 304.10 = 137.47 : x
  2. Step 2: Convert to fraction form
    220.48/304.10 = 137.47/x
  3. Step 3: Cross multiply
    220.48x = 304.10 × 137.47
  4. Step 4: Simplify right side
    220.48x = 41,802.42
  5. Step 5: Solve for x
    x = 41,802.42/220.48
  6. Step 6: Final answer
    x = 189.60

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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.