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Finding the Fourth Proportional to 699.62, 965.47 and 404.89

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Solution

The fourth proportional to 699.62, 965.47 and 404.89 is: 558.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.62 : 965.47 = 404.89 : x
  2. Step 2: Convert to fraction form
    699.62/965.47 = 404.89/x
  3. Step 3: Cross multiply
    699.62x = 965.47 × 404.89
  4. Step 4: Simplify right side
    699.62x = 390,906.48
  5. Step 5: Solve for x
    x = 390,906.48/699.62
  6. Step 6: Final answer
    x = 558.75

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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.