Home / 1,621.05-2,431.29-580.87

Finding the Fourth Proportional to 1,621.05, 2,431.29 and 580.87

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Solution

The fourth proportional to 1,621.05, 2,431.29 and 580.87 is: 871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.05 : 2,431.29 = 580.87 : x
  2. Step 2: Convert to fraction form
    1,621.05/2,431.29 = 580.87/x
  3. Step 3: Cross multiply
    1,621.05x = 2,431.29 × 580.87
  4. Step 4: Simplify right side
    1,621.05x = 1,412,268.64
  5. Step 5: Solve for x
    x = 1,412,268.64/1,621.05
  6. Step 6: Final answer
    x = 871.21

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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.