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Finding the Fourth Proportional to 347.50, 479.55 and 200.15

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Solution

The fourth proportional to 347.50, 479.55 and 200.15 is: 276.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.50 : 479.55 = 200.15 : x
  2. Step 2: Convert to fraction form
    347.50/479.55 = 200.15/x
  3. Step 3: Cross multiply
    347.50x = 479.55 × 200.15
  4. Step 4: Simplify right side
    347.50x = 95,981.93
  5. Step 5: Solve for x
    x = 95,981.93/347.50
  6. Step 6: Final answer
    x = 276.21

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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.