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Finding the Fourth Proportional to 1,687.43, 2,533.88 and 1,270.99

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Solution

The fourth proportional to 1,687.43, 2,533.88 and 1,270.99 is: 1,908.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.43 : 2,533.88 = 1,270.99 : x
  2. Step 2: Convert to fraction form
    1,687.43/2,533.88 = 1,270.99/x
  3. Step 3: Cross multiply
    1,687.43x = 2,533.88 × 1,270.99
  4. Step 4: Simplify right side
    1,687.43x = 3,220,542.49
  5. Step 5: Solve for x
    x = 3,220,542.49/1,687.43
  6. Step 6: Final answer
    x = 1,908.55

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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.