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Finding the Fourth Proportional to 936.16, 1,292.46 and 605.17

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Solution

The fourth proportional to 936.16, 1,292.46 and 605.17 is: 835.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.16 : 1,292.46 = 605.17 : x
  2. Step 2: Convert to fraction form
    936.16/1,292.46 = 605.17/x
  3. Step 3: Cross multiply
    936.16x = 1,292.46 × 605.17
  4. Step 4: Simplify right side
    936.16x = 782,157.36
  5. Step 5: Solve for x
    x = 782,157.36/936.16
  6. Step 6: Final answer
    x = 835.50

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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.