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Finding the Fourth Proportional to 1,738.78, 2,398.74 and 1,039.75

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Solution

The fourth proportional to 1,738.78, 2,398.74 and 1,039.75 is: 1,434.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,738.78 : 2,398.74 = 1,039.75 : x
  2. Step 2: Convert to fraction form
    1,738.78/2,398.74 = 1,039.75/x
  3. Step 3: Cross multiply
    1,738.78x = 2,398.74 × 1,039.75
  4. Step 4: Simplify right side
    1,738.78x = 2,494,089.92
  5. Step 5: Solve for x
    x = 2,494,089.92/1,738.78
  6. Step 6: Final answer
    x = 1,434.39

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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.