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Finding the Fourth Proportional to 938.84, 1,295.94 and 763.88

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Solution

The fourth proportional to 938.84, 1,295.94 and 763.88 is: 1,054.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.84 : 1,295.94 = 763.88 : x
  2. Step 2: Convert to fraction form
    938.84/1,295.94 = 763.88/x
  3. Step 3: Cross multiply
    938.84x = 1,295.94 × 763.88
  4. Step 4: Simplify right side
    938.84x = 989,942.65
  5. Step 5: Solve for x
    x = 989,942.65/938.84
  6. Step 6: Final answer
    x = 1,054.43

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1.5x scale

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.