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Finding the Fourth Proportional to 687.92, 949.74 and 563.36

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Solution

The fourth proportional to 687.92, 949.74 and 563.36 is: 777.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.92 : 949.74 = 563.36 : x
  2. Step 2: Convert to fraction form
    687.92/949.74 = 563.36/x
  3. Step 3: Cross multiply
    687.92x = 949.74 × 563.36
  4. Step 4: Simplify right side
    687.92x = 535,045.53
  5. Step 5: Solve for x
    x = 535,045.53/687.92
  6. Step 6: Final answer
    x = 777.77

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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.