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Finding the Fourth Proportional to 465.59, 698.38 and 208.91

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Solution

The fourth proportional to 465.59, 698.38 and 208.91 is: 313.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.59 : 698.38 = 208.91 : x
  2. Step 2: Convert to fraction form
    465.59/698.38 = 208.91/x
  3. Step 3: Cross multiply
    465.59x = 698.38 × 208.91
  4. Step 4: Simplify right side
    465.59x = 145,896.82
  5. Step 5: Solve for x
    x = 145,896.82/465.59
  6. Step 6: Final answer
    x = 313.36

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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.