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Finding the Fourth Proportional to 1,908.63, 2,634 and 1,069.28

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Solution

The fourth proportional to 1,908.63, 2,634 and 1,069.28 is: 1,475.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.63 : 2,634 = 1,069.28 : x
  2. Step 2: Convert to fraction form
    1,908.63/2,634 = 1,069.28/x
  3. Step 3: Cross multiply
    1,908.63x = 2,634 × 1,069.28
  4. Step 4: Simplify right side
    1,908.63x = 2,816,483.52
  5. Step 5: Solve for x
    x = 2,816,483.52/1,908.63
  6. Step 6: Final answer
    x = 1,475.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.