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Finding the Fourth Proportional to 347.48, 479.63 and 200.21

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Solution

The fourth proportional to 347.48, 479.63 and 200.21 is: 276.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.48 : 479.63 = 200.21 : x
  2. Step 2: Convert to fraction form
    347.48/479.63 = 200.21/x
  3. Step 3: Cross multiply
    347.48x = 479.63 × 200.21
  4. Step 4: Simplify right side
    347.48x = 96,026.72
  5. Step 5: Solve for x
    x = 96,026.72/347.48
  6. Step 6: Final answer
    x = 276.35

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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.