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Finding the Fourth Proportional to 666.93, 918.39 and 573.57

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Solution

The fourth proportional to 666.93, 918.39 and 573.57 is: 789.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.93 : 918.39 = 573.57 : x
  2. Step 2: Convert to fraction form
    666.93/918.39 = 573.57/x
  3. Step 3: Cross multiply
    666.93x = 918.39 × 573.57
  4. Step 4: Simplify right side
    666.93x = 526,760.95
  5. Step 5: Solve for x
    x = 526,760.95/666.93
  6. Step 6: Final answer
    x = 789.83

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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.