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Finding the Fourth Proportional to 3,101.79, 4,279.25 and 1,774.78

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Solution

The fourth proportional to 3,101.79, 4,279.25 and 1,774.78 is: 2,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.79 : 4,279.25 = 1,774.78 : x
  2. Step 2: Convert to fraction form
    3,101.79/4,279.25 = 1,774.78/x
  3. Step 3: Cross multiply
    3,101.79x = 4,279.25 × 1,774.78
  4. Step 4: Simplify right side
    3,101.79x = 7,594,718.44
  5. Step 5: Solve for x
    x = 7,594,718.44/3,101.79
  6. Step 6: Final answer
    x = 2,448.50

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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.