Home / 1,820.56-2,512.20-1,121.80

Finding the Fourth Proportional to 1,820.56, 2,512.20 and 1,121.80

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Solution

The fourth proportional to 1,820.56, 2,512.20 and 1,121.80 is: 1,547.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.56 : 2,512.20 = 1,121.80 : x
  2. Step 2: Convert to fraction form
    1,820.56/2,512.20 = 1,121.80/x
  3. Step 3: Cross multiply
    1,820.56x = 2,512.20 × 1,121.80
  4. Step 4: Simplify right side
    1,820.56x = 2,818,185.96
  5. Step 5: Solve for x
    x = 2,818,185.96/1,820.56
  6. Step 6: Final answer
    x = 1,547.98

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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.