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Finding the Fourth Proportional to 3,430.62, 5,145.90 and 965.42

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Solution

The fourth proportional to 3,430.62, 5,145.90 and 965.42 is: 1,448.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.62 : 5,145.90 = 965.42 : x
  2. Step 2: Convert to fraction form
    3,430.62/5,145.90 = 965.42/x
  3. Step 3: Cross multiply
    3,430.62x = 5,145.90 × 965.42
  4. Step 4: Simplify right side
    3,430.62x = 4,967,974.58
  5. Step 5: Solve for x
    x = 4,967,974.58/3,430.62
  6. Step 6: Final answer
    x = 1,448.13

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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.