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Finding the Fourth Proportional to 665.94, 918.53 and 444.86

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Solution

The fourth proportional to 665.94, 918.53 and 444.86 is: 613.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.94 : 918.53 = 444.86 : x
  2. Step 2: Convert to fraction form
    665.94/918.53 = 444.86/x
  3. Step 3: Cross multiply
    665.94x = 918.53 × 444.86
  4. Step 4: Simplify right side
    665.94x = 408,610.44
  5. Step 5: Solve for x
    x = 408,610.44/665.94
  6. Step 6: Final answer
    x = 613.58

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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.