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Finding the Fourth Proportional to 942.01, 1,411.41 and 666.75

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Solution

The fourth proportional to 942.01, 1,411.41 and 666.75 is: 998.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.01 : 1,411.41 = 666.75 : x
  2. Step 2: Convert to fraction form
    942.01/1,411.41 = 666.75/x
  3. Step 3: Cross multiply
    942.01x = 1,411.41 × 666.75
  4. Step 4: Simplify right side
    942.01x = 941,057.62
  5. Step 5: Solve for x
    x = 941,057.62/942.01
  6. Step 6: Final answer
    x = 998.99

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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.