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Finding the Fourth Proportional to 949.98, 1,310.94 and 634.90

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Solution

The fourth proportional to 949.98, 1,310.94 and 634.90 is: 876.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.98 : 1,310.94 = 634.90 : x
  2. Step 2: Convert to fraction form
    949.98/1,310.94 = 634.90/x
  3. Step 3: Cross multiply
    949.98x = 1,310.94 × 634.90
  4. Step 4: Simplify right side
    949.98x = 832,315.81
  5. Step 5: Solve for x
    x = 832,315.81/949.98
  6. Step 6: Final answer
    x = 876.14

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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.