Home / 2,519.48-3,775.92-1,287.20

Finding the Fourth Proportional to 2,519.48, 3,775.92 and 1,287.20

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Solution

The fourth proportional to 2,519.48, 3,775.92 and 1,287.20 is: 1,929.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,519.48 : 3,775.92 = 1,287.20 : x
  2. Step 2: Convert to fraction form
    2,519.48/3,775.92 = 1,287.20/x
  3. Step 3: Cross multiply
    2,519.48x = 3,775.92 × 1,287.20
  4. Step 4: Simplify right side
    2,519.48x = 4,860,364.22
  5. Step 5: Solve for x
    x = 4,860,364.22/2,519.48
  6. Step 6: Final answer
    x = 1,929.11

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1.5x scale

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.