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Finding the Fourth Proportional to 489.38, 675.54 and 349.52

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Solution

The fourth proportional to 489.38, 675.54 and 349.52 is: 482.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.38 : 675.54 = 349.52 : x
  2. Step 2: Convert to fraction form
    489.38/675.54 = 349.52/x
  3. Step 3: Cross multiply
    489.38x = 675.54 × 349.52
  4. Step 4: Simplify right side
    489.38x = 236,111.36
  5. Step 5: Solve for x
    x = 236,111.36/489.38
  6. Step 6: Final answer
    x = 482.48

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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.