Home / 2,859.12-4,287.90-1,215.60

Finding the Fourth Proportional to 2,859.12, 4,287.90 and 1,215.60

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Solution

The fourth proportional to 2,859.12, 4,287.90 and 1,215.60 is: 1,823.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.12 : 4,287.90 = 1,215.60 : x
  2. Step 2: Convert to fraction form
    2,859.12/4,287.90 = 1,215.60/x
  3. Step 3: Cross multiply
    2,859.12x = 4,287.90 × 1,215.60
  4. Step 4: Simplify right side
    2,859.12x = 5,212,371.24
  5. Step 5: Solve for x
    x = 5,212,371.24/2,859.12
  6. Step 6: Final answer
    x = 1,823.07

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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.