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Finding the Fourth Proportional to 2,087.79, 3,131.67 and 626.94

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Solution

The fourth proportional to 2,087.79, 3,131.67 and 626.94 is: 940.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.79 : 3,131.67 = 626.94 : x
  2. Step 2: Convert to fraction form
    2,087.79/3,131.67 = 626.94/x
  3. Step 3: Cross multiply
    2,087.79x = 3,131.67 × 626.94
  4. Step 4: Simplify right side
    2,087.79x = 1,963,369.19
  5. Step 5: Solve for x
    x = 1,963,369.19/2,087.79
  6. Step 6: Final answer
    x = 940.41

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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.