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Finding the Fourth Proportional to 626.98, 863.58 and 564.64

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Solution

The fourth proportional to 626.98, 863.58 and 564.64 is: 777.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.98 : 863.58 = 564.64 : x
  2. Step 2: Convert to fraction form
    626.98/863.58 = 564.64/x
  3. Step 3: Cross multiply
    626.98x = 863.58 × 564.64
  4. Step 4: Simplify right side
    626.98x = 487,611.81
  5. Step 5: Solve for x
    x = 487,611.81/626.98
  6. Step 6: Final answer
    x = 777.72

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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.