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Finding the Fourth Proportional to 936.68, 1,292.19 and 563.45

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Solution

The fourth proportional to 936.68, 1,292.19 and 563.45 is: 777.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.68 : 1,292.19 = 563.45 : x
  2. Step 2: Convert to fraction form
    936.68/1,292.19 = 563.45/x
  3. Step 3: Cross multiply
    936.68x = 1,292.19 × 563.45
  4. Step 4: Simplify right side
    936.68x = 728,077.99
  5. Step 5: Solve for x
    x = 728,077.99/936.68
  6. Step 6: Final answer
    x = 777.30

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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.