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Finding the Fourth Proportional to 347.62, 479.55 and 216.55

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Solution

The fourth proportional to 347.62, 479.55 and 216.55 is: 298.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.62 : 479.55 = 216.55 : x
  2. Step 2: Convert to fraction form
    347.62/479.55 = 216.55/x
  3. Step 3: Cross multiply
    347.62x = 479.55 × 216.55
  4. Step 4: Simplify right side
    347.62x = 103,846.55
  5. Step 5: Solve for x
    x = 103,846.55/347.62
  6. Step 6: Final answer
    x = 298.74

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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.