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Finding the Fourth Proportional to 1,064.22, 1,468.64 and 644.58

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Solution

The fourth proportional to 1,064.22, 1,468.64 and 644.58 is: 889.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.22 : 1,468.64 = 644.58 : x
  2. Step 2: Convert to fraction form
    1,064.22/1,468.64 = 644.58/x
  3. Step 3: Cross multiply
    1,064.22x = 1,468.64 × 644.58
  4. Step 4: Simplify right side
    1,064.22x = 946,655.97
  5. Step 5: Solve for x
    x = 946,655.97/1,064.22
  6. Step 6: Final answer
    x = 889.53

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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.