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Finding the Fourth Proportional to 2,990.88, 4,487.07 and 1,759.32

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Solution

The fourth proportional to 2,990.88, 4,487.07 and 1,759.32 is: 2,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.88 : 4,487.07 = 1,759.32 : x
  2. Step 2: Convert to fraction form
    2,990.88/4,487.07 = 1,759.32/x
  3. Step 3: Cross multiply
    2,990.88x = 4,487.07 × 1,759.32
  4. Step 4: Simplify right side
    2,990.88x = 7,894,191.99
  5. Step 5: Solve for x
    x = 7,894,191.99/2,990.88
  6. Step 6: Final answer
    x = 2,639.42

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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.