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Finding the Fourth Proportional to 685.28, 944.57 and 535.64

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Solution

The fourth proportional to 685.28, 944.57 and 535.64 is: 738.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.28 : 944.57 = 535.64 : x
  2. Step 2: Convert to fraction form
    685.28/944.57 = 535.64/x
  3. Step 3: Cross multiply
    685.28x = 944.57 × 535.64
  4. Step 4: Simplify right side
    685.28x = 505,949.47
  5. Step 5: Solve for x
    x = 505,949.47/685.28
  6. Step 6: Final answer
    x = 738.31

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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.