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Finding the Fourth Proportional to 347.18, 479.00 and 207.28

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Solution

The fourth proportional to 347.18, 479.00 and 207.28 is: 285.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.18 : 479.00 = 207.28 : x
  2. Step 2: Convert to fraction form
    347.18/479.00 = 207.28/x
  3. Step 3: Cross multiply
    347.18x = 479.00 × 207.28
  4. Step 4: Simplify right side
    347.18x = 99,283.69
  5. Step 5: Solve for x
    x = 99,283.69/347.18
  6. Step 6: Final answer
    x = 285.97

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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.