Home / 5,245.71-7,238.75-2,887.40

Finding the Fourth Proportional to 5,245.71, 7,238.75 and 2,887.40

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Solution

The fourth proportional to 5,245.71, 7,238.75 and 2,887.40 is: 3,984.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.71 : 7,238.75 = 2,887.40 : x
  2. Step 2: Convert to fraction form
    5,245.71/7,238.75 = 2,887.40/x
  3. Step 3: Cross multiply
    5,245.71x = 7,238.75 × 2,887.40
  4. Step 4: Simplify right side
    5,245.71x = 20,901,116.12
  5. Step 5: Solve for x
    x = 20,901,116.12/5,245.71
  6. Step 6: Final answer
    x = 3,984.42

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1.5x scale

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.