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Finding the Fourth Proportional to 347.17, 478.95 and 222.81

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Solution

The fourth proportional to 347.17, 478.95 and 222.81 is: 307.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.17 : 478.95 = 222.81 : x
  2. Step 2: Convert to fraction form
    347.17/478.95 = 222.81/x
  3. Step 3: Cross multiply
    347.17x = 478.95 × 222.81
  4. Step 4: Simplify right side
    347.17x = 106,713.47
  5. Step 5: Solve for x
    x = 106,713.47/347.17
  6. Step 6: Final answer
    x = 307.38

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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.