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Finding the Fourth Proportional to 347, 479.54 and 284.73

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Solution

The fourth proportional to 347, 479.54 and 284.73 is: 393.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    347 : 479.54 = 284.73 : x
  2. Step 2: Convert to fraction form
    347/479.54 = 284.73/x
  3. Step 3: Cross multiply
    347x = 479.54 × 284.73
  4. Step 4: Simplify right side
    347x = 136,539.42
  5. Step 5: Solve for x
    x = 136,539.42/347
  6. Step 6: Final answer
    x = 393.49

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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.