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Finding the Fourth Proportional to 768.45, 1,060.38 and 449.37

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Solution

The fourth proportional to 768.45, 1,060.38 and 449.37 is: 620.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.45 : 1,060.38 = 449.37 : x
  2. Step 2: Convert to fraction form
    768.45/1,060.38 = 449.37/x
  3. Step 3: Cross multiply
    768.45x = 1,060.38 × 449.37
  4. Step 4: Simplify right side
    768.45x = 476,502.96
  5. Step 5: Solve for x
    x = 476,502.96/768.45
  6. Step 6: Final answer
    x = 620.08

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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.