Home / 1,905.20-2,857.32-750.96

Finding the Fourth Proportional to 1,905.20, 2,857.32 and 750.96

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Solution

The fourth proportional to 1,905.20, 2,857.32 and 750.96 is: 1,126.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.20 : 2,857.32 = 750.96 : x
  2. Step 2: Convert to fraction form
    1,905.20/2,857.32 = 750.96/x
  3. Step 3: Cross multiply
    1,905.20x = 2,857.32 × 750.96
  4. Step 4: Simplify right side
    1,905.20x = 2,145,733.03
  5. Step 5: Solve for x
    x = 2,145,733.03/1,905.20
  6. Step 6: Final answer
    x = 1,126.25

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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.