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Finding the Fourth Proportional to 694.56, 957.60 and 563.28

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Solution

The fourth proportional to 694.56, 957.60 and 563.28 is: 776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.56 : 957.60 = 563.28 : x
  2. Step 2: Convert to fraction form
    694.56/957.60 = 563.28/x
  3. Step 3: Cross multiply
    694.56x = 957.60 × 563.28
  4. Step 4: Simplify right side
    694.56x = 539,396.93
  5. Step 5: Solve for x
    x = 539,396.93/694.56
  6. Step 6: Final answer
    x = 776.60

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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.