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Finding the Fourth Proportional to 1,645.92, 2,270.93 and 964.55

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Solution

The fourth proportional to 1,645.92, 2,270.93 and 964.55 is: 1,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.92 : 2,270.93 = 964.55 : x
  2. Step 2: Convert to fraction form
    1,645.92/2,270.93 = 964.55/x
  3. Step 3: Cross multiply
    1,645.92x = 2,270.93 × 964.55
  4. Step 4: Simplify right side
    1,645.92x = 2,190,409.35
  5. Step 5: Solve for x
    x = 2,190,409.35/1,645.92
  6. Step 6: Final answer
    x = 1,330.81

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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.