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Finding the Fourth Proportional to 699.84, 965.35 and 447.66

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Solution

The fourth proportional to 699.84, 965.35 and 447.66 is: 617.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.84 : 965.35 = 447.66 : x
  2. Step 2: Convert to fraction form
    699.84/965.35 = 447.66/x
  3. Step 3: Cross multiply
    699.84x = 965.35 × 447.66
  4. Step 4: Simplify right side
    699.84x = 432,149.14
  5. Step 5: Solve for x
    x = 432,149.14/699.84
  6. Step 6: Final answer
    x = 617.50

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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.