Home / 1,821.85-2,515.30-1,262.12

Finding the Fourth Proportional to 1,821.85, 2,515.30 and 1,262.12

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Solution

The fourth proportional to 1,821.85, 2,515.30 and 1,262.12 is: 1,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.85 : 2,515.30 = 1,262.12 : x
  2. Step 2: Convert to fraction form
    1,821.85/2,515.30 = 1,262.12/x
  3. Step 3: Cross multiply
    1,821.85x = 2,515.30 × 1,262.12
  4. Step 4: Simplify right side
    1,821.85x = 3,174,597.86
  5. Step 5: Solve for x
    x = 3,174,597.86/1,821.85
  6. Step 6: Final answer
    x = 1,742.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.