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Finding the Fourth Proportional to 3,430.72, 5,146.38 and 965.56

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Solution

The fourth proportional to 3,430.72, 5,146.38 and 965.56 is: 1,448.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.72 : 5,146.38 = 965.56 : x
  2. Step 2: Convert to fraction form
    3,430.72/5,146.38 = 965.56/x
  3. Step 3: Cross multiply
    3,430.72x = 5,146.38 × 965.56
  4. Step 4: Simplify right side
    3,430.72x = 4,969,138.67
  5. Step 5: Solve for x
    x = 4,969,138.67/3,430.72
  6. Step 6: Final answer
    x = 1,448.42

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1.5x scale

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.