Home / 1,276.69-1,911.32-949.08

Finding the Fourth Proportional to 1,276.69, 1,911.32 and 949.08

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Solution

The fourth proportional to 1,276.69, 1,911.32 and 949.08 is: 1,420.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.69 : 1,911.32 = 949.08 : x
  2. Step 2: Convert to fraction form
    1,276.69/1,911.32 = 949.08/x
  3. Step 3: Cross multiply
    1,276.69x = 1,911.32 × 949.08
  4. Step 4: Simplify right side
    1,276.69x = 1,813,990.84
  5. Step 5: Solve for x
    x = 1,813,990.84/1,276.69
  6. Step 6: Final answer
    x = 1,420.85

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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.