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Finding the Fourth Proportional to 1,759.28, 2,639.40 and 605.12

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Solution

The fourth proportional to 1,759.28, 2,639.40 and 605.12 is: 907.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,759.28 : 2,639.40 = 605.12 : x
  2. Step 2: Convert to fraction form
    1,759.28/2,639.40 = 605.12/x
  3. Step 3: Cross multiply
    1,759.28x = 2,639.40 × 605.12
  4. Step 4: Simplify right side
    1,759.28x = 1,597,153.73
  5. Step 5: Solve for x
    x = 1,597,153.73/1,759.28
  6. Step 6: Final answer
    x = 907.85

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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.