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Finding the Fourth Proportional to 667.02, 918.09 and 637.86

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Solution

The fourth proportional to 667.02, 918.09 and 637.86 is: 877.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.02 : 918.09 = 637.86 : x
  2. Step 2: Convert to fraction form
    667.02/918.09 = 637.86/x
  3. Step 3: Cross multiply
    667.02x = 918.09 × 637.86
  4. Step 4: Simplify right side
    667.02x = 585,612.89
  5. Step 5: Solve for x
    x = 585,612.89/667.02
  6. Step 6: Final answer
    x = 877.95

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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.