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Finding the Fourth Proportional to 1,444, 1,993.20 and 920.38

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Solution

The fourth proportional to 1,444, 1,993.20 and 920.38 is: 1,270.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,444 : 1,993.20 = 920.38 : x
  2. Step 2: Convert to fraction form
    1,444/1,993.20 = 920.38/x
  3. Step 3: Cross multiply
    1,444x = 1,993.20 × 920.38
  4. Step 4: Simplify right side
    1,444x = 1,834,501.42
  5. Step 5: Solve for x
    x = 1,834,501.42/1,444
  6. Step 6: Final answer
    x = 1,270.43

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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.