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Finding the Fourth Proportional to 347.07, 478.87 and 199.72

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Solution

The fourth proportional to 347.07, 478.87 and 199.72 is: 275.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.07 : 478.87 = 199.72 : x
  2. Step 2: Convert to fraction form
    347.07/478.87 = 199.72/x
  3. Step 3: Cross multiply
    347.07x = 478.87 × 199.72
  4. Step 4: Simplify right side
    347.07x = 95,639.92
  5. Step 5: Solve for x
    x = 95,639.92/347.07
  6. Step 6: Final answer
    x = 275.56

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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.