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Finding the Fourth Proportional to 347.66, 479.78 and 214.85

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Solution

The fourth proportional to 347.66, 479.78 and 214.85 is: 296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.66 : 479.78 = 214.85 : x
  2. Step 2: Convert to fraction form
    347.66/479.78 = 214.85/x
  3. Step 3: Cross multiply
    347.66x = 479.78 × 214.85
  4. Step 4: Simplify right side
    347.66x = 103,079.66
  5. Step 5: Solve for x
    x = 103,079.66/347.66
  6. Step 6: Final answer
    x = 296.50

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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.