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Finding the Fourth Proportional to 949.13, 1,309.79 and 535.13

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Solution

The fourth proportional to 949.13, 1,309.79 and 535.13 is: 738.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.13 : 1,309.79 = 535.13 : x
  2. Step 2: Convert to fraction form
    949.13/1,309.79 = 535.13/x
  3. Step 3: Cross multiply
    949.13x = 1,309.79 × 535.13
  4. Step 4: Simplify right side
    949.13x = 700,907.92
  5. Step 5: Solve for x
    x = 700,907.92/949.13
  6. Step 6: Final answer
    x = 738.47

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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.