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Finding the Fourth Proportional to 1,063.98, 1,467.74 and 644.35

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Solution

The fourth proportional to 1,063.98, 1,467.74 and 644.35 is: 888.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.98 : 1,467.74 = 644.35 : x
  2. Step 2: Convert to fraction form
    1,063.98/1,467.74 = 644.35/x
  3. Step 3: Cross multiply
    1,063.98x = 1,467.74 × 644.35
  4. Step 4: Simplify right side
    1,063.98x = 945,736.21
  5. Step 5: Solve for x
    x = 945,736.21/1,063.98
  6. Step 6: Final answer
    x = 888.87

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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.