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Finding the Fourth Proportional to 946.36, 1,305.26 and 666.67

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Solution

The fourth proportional to 946.36, 1,305.26 and 666.67 is: 919.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.36 : 1,305.26 = 666.67 : x
  2. Step 2: Convert to fraction form
    946.36/1,305.26 = 666.67/x
  3. Step 3: Cross multiply
    946.36x = 1,305.26 × 666.67
  4. Step 4: Simplify right side
    946.36x = 870,171.09
  5. Step 5: Solve for x
    x = 870,171.09/946.36
  6. Step 6: Final answer
    x = 919.50

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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.