Home / 2,812.08-4,218.60-1,272.24

Finding the Fourth Proportional to 2,812.08, 4,218.60 and 1,272.24

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Solution

The fourth proportional to 2,812.08, 4,218.60 and 1,272.24 is: 1,908.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.08 : 4,218.60 = 1,272.24 : x
  2. Step 2: Convert to fraction form
    2,812.08/4,218.60 = 1,272.24/x
  3. Step 3: Cross multiply
    2,812.08x = 4,218.60 × 1,272.24
  4. Step 4: Simplify right side
    2,812.08x = 5,367,071.66
  5. Step 5: Solve for x
    x = 5,367,071.66/2,812.08
  6. Step 6: Final answer
    x = 1,908.58

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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.