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Finding the Fourth Proportional to 667.54, 918.22 and 623.80

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Solution

The fourth proportional to 667.54, 918.22 and 623.80 is: 858.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.54 : 918.22 = 623.80 : x
  2. Step 2: Convert to fraction form
    667.54/918.22 = 623.80/x
  3. Step 3: Cross multiply
    667.54x = 918.22 × 623.80
  4. Step 4: Simplify right side
    667.54x = 572,777.93
  5. Step 5: Solve for x
    x = 572,777.93/667.54
  6. Step 6: Final answer
    x = 858.05

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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.