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Finding the Fourth Proportional to 1,724.07, 2,379.12 and 938.07

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Solution

The fourth proportional to 1,724.07, 2,379.12 and 938.07 is: 1,294.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.07 : 2,379.12 = 938.07 : x
  2. Step 2: Convert to fraction form
    1,724.07/2,379.12 = 938.07/x
  3. Step 3: Cross multiply
    1,724.07x = 2,379.12 × 938.07
  4. Step 4: Simplify right side
    1,724.07x = 2,231,781.10
  5. Step 5: Solve for x
    x = 2,231,781.10/1,724.07
  6. Step 6: Final answer
    x = 1,294.48

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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.