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Finding the Fourth Proportional to 888.57, 1,327.76 and 640.58

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Solution

The fourth proportional to 888.57, 1,327.76 and 640.58 is: 957.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.57 : 1,327.76 = 640.58 : x
  2. Step 2: Convert to fraction form
    888.57/1,327.76 = 640.58/x
  3. Step 3: Cross multiply
    888.57x = 1,327.76 × 640.58
  4. Step 4: Simplify right side
    888.57x = 850,529.06
  5. Step 5: Solve for x
    x = 850,529.06/888.57
  6. Step 6: Final answer
    x = 957.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.