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Finding the Fourth Proportional to 515.44, 710.88 and 349.39

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Solution

The fourth proportional to 515.44, 710.88 and 349.39 is: 481.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.44 : 710.88 = 349.39 : x
  2. Step 2: Convert to fraction form
    515.44/710.88 = 349.39/x
  3. Step 3: Cross multiply
    515.44x = 710.88 × 349.39
  4. Step 4: Simplify right side
    515.44x = 248,374.36
  5. Step 5: Solve for x
    x = 248,374.36/515.44
  6. Step 6: Final answer
    x = 481.87

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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.