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Finding the Fourth Proportional to 768.30, 1,059.30 and 650.07

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Solution

The fourth proportional to 768.30, 1,059.30 and 650.07 is: 896.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.30 : 1,059.30 = 650.07 : x
  2. Step 2: Convert to fraction form
    768.30/1,059.30 = 650.07/x
  3. Step 3: Cross multiply
    768.30x = 1,059.30 × 650.07
  4. Step 4: Simplify right side
    768.30x = 688,619.15
  5. Step 5: Solve for x
    x = 688,619.15/768.30
  6. Step 6: Final answer
    x = 896.29

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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.