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Finding the Fourth Proportional to 889.74, 1,226.64 and 623.82

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Solution

The fourth proportional to 889.74, 1,226.64 and 623.82 is: 860.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.74 : 1,226.64 = 623.82 : x
  2. Step 2: Convert to fraction form
    889.74/1,226.64 = 623.82/x
  3. Step 3: Cross multiply
    889.74x = 1,226.64 × 623.82
  4. Step 4: Simplify right side
    889.74x = 765,202.56
  5. Step 5: Solve for x
    x = 765,202.56/889.74
  6. Step 6: Final answer
    x = 860.03

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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.