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Finding the Fourth Proportional to 910.08, 1,364.31 and 666.27

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Solution

The fourth proportional to 910.08, 1,364.31 and 666.27 is: 998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.08 : 1,364.31 = 666.27 : x
  2. Step 2: Convert to fraction form
    910.08/1,364.31 = 666.27/x
  3. Step 3: Cross multiply
    910.08x = 1,364.31 × 666.27
  4. Step 4: Simplify right side
    910.08x = 908,998.82
  5. Step 5: Solve for x
    x = 908,998.82/910.08
  6. Step 6: Final answer
    x = 998.81

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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.