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Finding the Fourth Proportional to 936.55, 1,292.03 and 605.00

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Solution

The fourth proportional to 936.55, 1,292.03 and 605.00 is: 834.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.55 : 1,292.03 = 605.00 : x
  2. Step 2: Convert to fraction form
    936.55/1,292.03 = 605.00/x
  3. Step 3: Cross multiply
    936.55x = 1,292.03 × 605.00
  4. Step 4: Simplify right side
    936.55x = 781,678.92
  5. Step 5: Solve for x
    x = 781,678.92/936.55
  6. Step 6: Final answer
    x = 834.64

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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.