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Finding the Fourth Proportional to 665.03, 918.12 and 444.30

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Solution

The fourth proportional to 665.03, 918.12 and 444.30 is: 613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.03 : 918.12 = 444.30 : x
  2. Step 2: Convert to fraction form
    665.03/918.12 = 444.30/x
  3. Step 3: Cross multiply
    665.03x = 918.12 × 444.30
  4. Step 4: Simplify right side
    665.03x = 407,920.72
  5. Step 5: Solve for x
    x = 407,920.72/665.03
  6. Step 6: Final answer
    x = 613.39

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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.