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Finding the Fourth Proportional to 1,738.40, 2,398.74 and 992.24

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Solution

The fourth proportional to 1,738.40, 2,398.74 and 992.24 is: 1,369.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,738.40 : 2,398.74 = 992.24 : x
  2. Step 2: Convert to fraction form
    1,738.40/2,398.74 = 992.24/x
  3. Step 3: Cross multiply
    1,738.40x = 2,398.74 × 992.24
  4. Step 4: Simplify right side
    1,738.40x = 2,380,125.78
  5. Step 5: Solve for x
    x = 2,380,125.78/1,738.40
  6. Step 6: Final answer
    x = 1,369.15

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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.