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Finding the Fourth Proportional to 1,628.72, 2,247.08 and 965.84

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Solution

The fourth proportional to 1,628.72, 2,247.08 and 965.84 is: 1,332.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.72 : 2,247.08 = 965.84 : x
  2. Step 2: Convert to fraction form
    1,628.72/2,247.08 = 965.84/x
  3. Step 3: Cross multiply
    1,628.72x = 2,247.08 × 965.84
  4. Step 4: Simplify right side
    1,628.72x = 2,170,319.75
  5. Step 5: Solve for x
    x = 2,170,319.75/1,628.72
  6. Step 6: Final answer
    x = 1,332.53

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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.