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Finding the Fourth Proportional to 2,887.80, 4,332.12 and 1,245.12

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Solution

The fourth proportional to 2,887.80, 4,332.12 and 1,245.12 is: 1,867.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.80 : 4,332.12 = 1,245.12 : x
  2. Step 2: Convert to fraction form
    2,887.80/4,332.12 = 1,245.12/x
  3. Step 3: Cross multiply
    2,887.80x = 4,332.12 × 1,245.12
  4. Step 4: Simplify right side
    2,887.80x = 5,394,009.25
  5. Step 5: Solve for x
    x = 5,394,009.25/2,887.80
  6. Step 6: Final answer
    x = 1,867.86

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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.