Home / 2,690.16-4,035.38-841.28

Finding the Fourth Proportional to 2,690.16, 4,035.38 and 841.28

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Solution

The fourth proportional to 2,690.16, 4,035.38 and 841.28 is: 1,261.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.16 : 4,035.38 = 841.28 : x
  2. Step 2: Convert to fraction form
    2,690.16/4,035.38 = 841.28/x
  3. Step 3: Cross multiply
    2,690.16x = 4,035.38 × 841.28
  4. Step 4: Simplify right side
    2,690.16x = 3,394,860.10
  5. Step 5: Solve for x
    x = 3,394,860.10/2,690.16
  6. Step 6: Final answer
    x = 1,261.95

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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.