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Finding the Fourth Proportional to 888.33, 1,226.01 and 640.47

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Solution

The fourth proportional to 888.33, 1,226.01 and 640.47 is: 883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.33 : 1,226.01 = 640.47 : x
  2. Step 2: Convert to fraction form
    888.33/1,226.01 = 640.47/x
  3. Step 3: Cross multiply
    888.33x = 1,226.01 × 640.47
  4. Step 4: Simplify right side
    888.33x = 785,222.62
  5. Step 5: Solve for x
    x = 785,222.62/888.33
  6. Step 6: Final answer
    x = 883.93

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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.