Home / 1,245.09-1,867.97-620.57

Finding the Fourth Proportional to 1,245.09, 1,867.97 and 620.57

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Solution

The fourth proportional to 1,245.09, 1,867.97 and 620.57 is: 931.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.09 : 1,867.97 = 620.57 : x
  2. Step 2: Convert to fraction form
    1,245.09/1,867.97 = 620.57/x
  3. Step 3: Cross multiply
    1,245.09x = 1,867.97 × 620.57
  4. Step 4: Simplify right side
    1,245.09x = 1,159,214.12
  5. Step 5: Solve for x
    x = 1,159,214.12/1,245.09
  6. Step 6: Final answer
    x = 931.03

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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.