Home / 1,805.18-2,712.90-1,231.70

Finding the Fourth Proportional to 1,805.18, 2,712.90 and 1,231.70

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Solution

The fourth proportional to 1,805.18, 2,712.90 and 1,231.70 is: 1,851.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.18 : 2,712.90 = 1,231.70 : x
  2. Step 2: Convert to fraction form
    1,805.18/2,712.90 = 1,231.70/x
  3. Step 3: Cross multiply
    1,805.18x = 2,712.90 × 1,231.70
  4. Step 4: Simplify right side
    1,805.18x = 3,341,478.93
  5. Step 5: Solve for x
    x = 3,341,478.93/1,805.18
  6. Step 6: Final answer
    x = 1,851.05

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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.