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Finding the Fourth Proportional to 946.15, 1,305.68 and 662.96

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Solution

The fourth proportional to 946.15, 1,305.68 and 662.96 is: 914.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.15 : 1,305.68 = 662.96 : x
  2. Step 2: Convert to fraction form
    946.15/1,305.68 = 662.96/x
  3. Step 3: Cross multiply
    946.15x = 1,305.68 × 662.96
  4. Step 4: Simplify right side
    946.15x = 865,613.56
  5. Step 5: Solve for x
    x = 865,613.56/946.15
  6. Step 6: Final answer
    x = 914.88

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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.