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Finding the Fourth Proportional to 347.19, 479.15 and 207.31

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Solution

The fourth proportional to 347.19, 479.15 and 207.31 is: 286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.19 : 479.15 = 207.31 : x
  2. Step 2: Convert to fraction form
    347.19/479.15 = 207.31/x
  3. Step 3: Cross multiply
    347.19x = 479.15 × 207.31
  4. Step 4: Simplify right side
    347.19x = 99,330.25
  5. Step 5: Solve for x
    x = 99,330.25/347.19
  6. Step 6: Final answer
    x = 286.10

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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.