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Finding the Fourth Proportional to 347.67, 479.61 and 243

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Solution

The fourth proportional to 347.67, 479.61 and 243 is: 335.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.67 : 479.61 = 243 : x
  2. Step 2: Convert to fraction form
    347.67/479.61 = 243/x
  3. Step 3: Cross multiply
    347.67x = 479.61 × 243
  4. Step 4: Simplify right side
    347.67x = 116,545.23
  5. Step 5: Solve for x
    x = 116,545.23/347.67
  6. Step 6: Final answer
    x = 335.22

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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.