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Finding the Fourth Proportional to 445.18, 666.15 and 262.66

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Solution

The fourth proportional to 445.18, 666.15 and 262.66 is: 393.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.18 : 666.15 = 262.66 : x
  2. Step 2: Convert to fraction form
    445.18/666.15 = 262.66/x
  3. Step 3: Cross multiply
    445.18x = 666.15 × 262.66
  4. Step 4: Simplify right side
    445.18x = 174,970.96
  5. Step 5: Solve for x
    x = 174,970.96/445.18
  6. Step 6: Final answer
    x = 393.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.