Home / 1,621.37-2,431.22-841.79

Finding the Fourth Proportional to 1,621.37, 2,431.22 and 841.79

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Solution

The fourth proportional to 1,621.37, 2,431.22 and 841.79 is: 1,262.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.37 : 2,431.22 = 841.79 : x
  2. Step 2: Convert to fraction form
    1,621.37/2,431.22 = 841.79/x
  3. Step 3: Cross multiply
    1,621.37x = 2,431.22 × 841.79
  4. Step 4: Simplify right side
    1,621.37x = 2,046,578.55
  5. Step 5: Solve for x
    x = 2,046,578.55/1,621.37
  6. Step 6: Final answer
    x = 1,262.25

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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.