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Finding the Fourth Proportional to 949.26, 1,309.47 and 772.41

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Solution

The fourth proportional to 949.26, 1,309.47 and 772.41 is: 1,065.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.26 : 1,309.47 = 772.41 : x
  2. Step 2: Convert to fraction form
    949.26/1,309.47 = 772.41/x
  3. Step 3: Cross multiply
    949.26x = 1,309.47 × 772.41
  4. Step 4: Simplify right side
    949.26x = 1,011,449.74
  5. Step 5: Solve for x
    x = 1,011,449.74/949.26
  6. Step 6: Final answer
    x = 1,065.51

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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.