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Finding the Fourth Proportional to 1,603.09, 2,212.23 and 965.42

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Solution

The fourth proportional to 1,603.09, 2,212.23 and 965.42 is: 1,332.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.09 : 2,212.23 = 965.42 : x
  2. Step 2: Convert to fraction form
    1,603.09/2,212.23 = 965.42/x
  3. Step 3: Cross multiply
    1,603.09x = 2,212.23 × 965.42
  4. Step 4: Simplify right side
    1,603.09x = 2,135,731.09
  5. Step 5: Solve for x
    x = 2,135,731.09/1,603.09
  6. Step 6: Final answer
    x = 1,332.26

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1.5x scale

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.