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Finding the Fourth Proportional to 2,739.51, 4,109.49 and 890.15

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Solution

The fourth proportional to 2,739.51, 4,109.49 and 890.15 is: 1,335.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.51 : 4,109.49 = 890.15 : x
  2. Step 2: Convert to fraction form
    2,739.51/4,109.49 = 890.15/x
  3. Step 3: Cross multiply
    2,739.51x = 4,109.49 × 890.15
  4. Step 4: Simplify right side
    2,739.51x = 3,658,041.98
  5. Step 5: Solve for x
    x = 3,658,041.98/2,739.51
  6. Step 6: Final answer
    x = 1,335.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.