Home / 1,621.27-2,431.81-525.55

Finding the Fourth Proportional to 1,621.27, 2,431.81 and 525.55

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Solution

The fourth proportional to 1,621.27, 2,431.81 and 525.55 is: 788.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.27 : 2,431.81 = 525.55 : x
  2. Step 2: Convert to fraction form
    1,621.27/2,431.81 = 525.55/x
  3. Step 3: Cross multiply
    1,621.27x = 2,431.81 × 525.55
  4. Step 4: Simplify right side
    1,621.27x = 1,278,037.75
  5. Step 5: Solve for x
    x = 1,278,037.75/1,621.27
  6. Step 6: Final answer
    x = 788.29

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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.