Home / 1,421.04-1,960.92-791.55

Finding the Fourth Proportional to 1,421.04, 1,960.92 and 791.55

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Solution

The fourth proportional to 1,421.04, 1,960.92 and 791.55 is: 1,092.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.04 : 1,960.92 = 791.55 : x
  2. Step 2: Convert to fraction form
    1,421.04/1,960.92 = 791.55/x
  3. Step 3: Cross multiply
    1,421.04x = 1,960.92 × 791.55
  4. Step 4: Simplify right side
    1,421.04x = 1,552,166.23
  5. Step 5: Solve for x
    x = 1,552,166.23/1,421.04
  6. Step 6: Final answer
    x = 1,092.27

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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.