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Finding the Fourth Proportional to 465.43, 698.15 and 208.63

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Solution

The fourth proportional to 465.43, 698.15 and 208.63 is: 312.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.43 : 698.15 = 208.63 : x
  2. Step 2: Convert to fraction form
    465.43/698.15 = 208.63/x
  3. Step 3: Cross multiply
    465.43x = 698.15 × 208.63
  4. Step 4: Simplify right side
    465.43x = 145,655.03
  5. Step 5: Solve for x
    x = 145,655.03/465.43
  6. Step 6: Final answer
    x = 312.95

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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.