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Finding the Fourth Proportional to 943.59, 1,413.81 and 668.34

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Solution

The fourth proportional to 943.59, 1,413.81 and 668.34 is: 1,001.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.59 : 1,413.81 = 668.34 : x
  2. Step 2: Convert to fraction form
    943.59/1,413.81 = 668.34/x
  3. Step 3: Cross multiply
    943.59x = 1,413.81 × 668.34
  4. Step 4: Simplify right side
    943.59x = 944,905.78
  5. Step 5: Solve for x
    x = 944,905.78/943.59
  6. Step 6: Final answer
    x = 1,001.39

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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.