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Finding the Fourth Proportional to 949.74, 1,310.75 and 556.75

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Solution

The fourth proportional to 949.74, 1,310.75 and 556.75 is: 768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.74 : 1,310.75 = 556.75 : x
  2. Step 2: Convert to fraction form
    949.74/1,310.75 = 556.75/x
  3. Step 3: Cross multiply
    949.74x = 1,310.75 × 556.75
  4. Step 4: Simplify right side
    949.74x = 729,760.06
  5. Step 5: Solve for x
    x = 729,760.06/949.74
  6. Step 6: Final answer
    x = 768.38

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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.