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Finding the Fourth Proportional to 2,758.69, 4,137.16 and 909.46

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Solution

The fourth proportional to 2,758.69, 4,137.16 and 909.46 is: 1,363.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.69 : 4,137.16 = 909.46 : x
  2. Step 2: Convert to fraction form
    2,758.69/4,137.16 = 909.46/x
  3. Step 3: Cross multiply
    2,758.69x = 4,137.16 × 909.46
  4. Step 4: Simplify right side
    2,758.69x = 3,762,576.99
  5. Step 5: Solve for x
    x = 3,762,576.99/2,758.69
  6. Step 6: Final answer
    x = 1,363.90

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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.