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Finding the Fourth Proportional to 644.83, 887.22 and 626.68

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Solution

The fourth proportional to 644.83, 887.22 and 626.68 is: 862.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.83 : 887.22 = 626.68 : x
  2. Step 2: Convert to fraction form
    644.83/887.22 = 626.68/x
  3. Step 3: Cross multiply
    644.83x = 887.22 × 626.68
  4. Step 4: Simplify right side
    644.83x = 556,003.03
  5. Step 5: Solve for x
    x = 556,003.03/644.83
  6. Step 6: Final answer
    x = 862.25

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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.