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Finding the Fourth Proportional to 3,108.79, 4,290.09 and 1,764.65

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Solution

The fourth proportional to 3,108.79, 4,290.09 and 1,764.65 is: 2,435.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.79 : 4,290.09 = 1,764.65 : x
  2. Step 2: Convert to fraction form
    3,108.79/4,290.09 = 1,764.65/x
  3. Step 3: Cross multiply
    3,108.79x = 4,290.09 × 1,764.65
  4. Step 4: Simplify right side
    3,108.79x = 7,570,507.32
  5. Step 5: Solve for x
    x = 7,570,507.32/3,108.79
  6. Step 6: Final answer
    x = 2,435.19

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Double scale
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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.