Home / 1,621.06-2,431.38-451.15

Finding the Fourth Proportional to 1,621.06, 2,431.38 and 451.15

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Solution

The fourth proportional to 1,621.06, 2,431.38 and 451.15 is: 676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.06 : 2,431.38 = 451.15 : x
  2. Step 2: Convert to fraction form
    1,621.06/2,431.38 = 451.15/x
  3. Step 3: Cross multiply
    1,621.06x = 2,431.38 × 451.15
  4. Step 4: Simplify right side
    1,621.06x = 1,096,904.93
  5. Step 5: Solve for x
    x = 1,096,904.93/1,621.06
  6. Step 6: Final answer
    x = 676.66

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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.