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Finding the Fourth Proportional to 347.18, 479.27 and 281.57

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Solution

The fourth proportional to 347.18, 479.27 and 281.57 is: 388.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.18 : 479.27 = 281.57 : x
  2. Step 2: Convert to fraction form
    347.18/479.27 = 281.57/x
  3. Step 3: Cross multiply
    347.18x = 479.27 × 281.57
  4. Step 4: Simplify right side
    347.18x = 134,944.25
  5. Step 5: Solve for x
    x = 134,944.25/347.18
  6. Step 6: Final answer
    x = 388.69

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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.