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Finding the Fourth Proportional to 1,765.64, 2,649 and 900.56

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Solution

The fourth proportional to 1,765.64, 2,649 and 900.56 is: 1,351.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.64 : 2,649 = 900.56 : x
  2. Step 2: Convert to fraction form
    1,765.64/2,649 = 900.56/x
  3. Step 3: Cross multiply
    1,765.64x = 2,649 × 900.56
  4. Step 4: Simplify right side
    1,765.64x = 2,385,583.44
  5. Step 5: Solve for x
    x = 2,385,583.44/1,765.64
  6. Step 6: Final answer
    x = 1,351.12

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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.