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Finding the Fourth Proportional to 557.52, 768.89 and 347.47

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Solution

The fourth proportional to 557.52, 768.89 and 347.47 is: 479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.52 : 768.89 = 347.47 : x
  2. Step 2: Convert to fraction form
    557.52/768.89 = 347.47/x
  3. Step 3: Cross multiply
    557.52x = 768.89 × 347.47
  4. Step 4: Simplify right side
    557.52x = 267,169.48
  5. Step 5: Solve for x
    x = 267,169.48/557.52
  6. Step 6: Final answer
    x = 479.21

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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.