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Finding the Fourth Proportional to 885.07, 1,327.88 and 638.83

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Solution

The fourth proportional to 885.07, 1,327.88 and 638.83 is: 958.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.07 : 1,327.88 = 638.83 : x
  2. Step 2: Convert to fraction form
    885.07/1,327.88 = 638.83/x
  3. Step 3: Cross multiply
    885.07x = 1,327.88 × 638.83
  4. Step 4: Simplify right side
    885.07x = 848,289.58
  5. Step 5: Solve for x
    x = 848,289.58/885.07
  6. Step 6: Final answer
    x = 958.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.