Home / 1,620.15-2,431.26-1,515.09

Finding the Fourth Proportional to 1,620.15, 2,431.26 and 1,515.09

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Solution

The fourth proportional to 1,620.15, 2,431.26 and 1,515.09 is: 2,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.15 : 2,431.26 = 1,515.09 : x
  2. Step 2: Convert to fraction form
    1,620.15/2,431.26 = 1,515.09/x
  3. Step 3: Cross multiply
    1,620.15x = 2,431.26 × 1,515.09
  4. Step 4: Simplify right side
    1,620.15x = 3,683,577.71
  5. Step 5: Solve for x
    x = 3,683,577.71/1,620.15
  6. Step 6: Final answer
    x = 2,273.60

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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.