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Finding the Fourth Proportional to 769.37, 1,061.19 and 559.32

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Solution

The fourth proportional to 769.37, 1,061.19 and 559.32 is: 771.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.37 : 1,061.19 = 559.32 : x
  2. Step 2: Convert to fraction form
    769.37/1,061.19 = 559.32/x
  3. Step 3: Cross multiply
    769.37x = 1,061.19 × 559.32
  4. Step 4: Simplify right side
    769.37x = 593,544.79
  5. Step 5: Solve for x
    x = 593,544.79/769.37
  6. Step 6: Final answer
    x = 771.47

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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.