Home / 2,690.21-4,035.62-841.28

Finding the Fourth Proportional to 2,690.21, 4,035.62 and 841.28

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Solution

The fourth proportional to 2,690.21, 4,035.62 and 841.28 is: 1,262.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.21 : 4,035.62 = 841.28 : x
  2. Step 2: Convert to fraction form
    2,690.21/4,035.62 = 841.28/x
  3. Step 3: Cross multiply
    2,690.21x = 4,035.62 × 841.28
  4. Step 4: Simplify right side
    2,690.21x = 3,395,062.01
  5. Step 5: Solve for x
    x = 3,395,062.01/2,690.21
  6. Step 6: Final answer
    x = 1,262.01

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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.