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Finding the Fourth Proportional to 2,087.92, 3,131.90 and 626.98

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Solution

The fourth proportional to 2,087.92, 3,131.90 and 626.98 is: 940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.92 : 3,131.90 = 626.98 : x
  2. Step 2: Convert to fraction form
    2,087.92/3,131.90 = 626.98/x
  3. Step 3: Cross multiply
    2,087.92x = 3,131.90 × 626.98
  4. Step 4: Simplify right side
    2,087.92x = 1,963,635.53
  5. Step 5: Solve for x
    x = 1,963,635.53/2,087.92
  6. Step 6: Final answer
    x = 940.48

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1.5x scale

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.