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Finding the Fourth Proportional to 636.39, 954.86 and 347.49

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Solution

The fourth proportional to 636.39, 954.86 and 347.49 is: 521.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.39 : 954.86 = 347.49 : x
  2. Step 2: Convert to fraction form
    636.39/954.86 = 347.49/x
  3. Step 3: Cross multiply
    636.39x = 954.86 × 347.49
  4. Step 4: Simplify right side
    636.39x = 331,802.56
  5. Step 5: Solve for x
    x = 331,802.56/636.39
  6. Step 6: Final answer
    x = 521.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.