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Finding the Fourth Proportional to 771.07, 1,063.81 and 603.63

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Solution

The fourth proportional to 771.07, 1,063.81 and 603.63 is: 832.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.07 : 1,063.81 = 603.63 : x
  2. Step 2: Convert to fraction form
    771.07/1,063.81 = 603.63/x
  3. Step 3: Cross multiply
    771.07x = 1,063.81 × 603.63
  4. Step 4: Simplify right side
    771.07x = 642,142.31
  5. Step 5: Solve for x
    x = 642,142.31/771.07
  6. Step 6: Final answer
    x = 832.79

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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.