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Finding the Fourth Proportional to 445.15, 666.51 and 228.30

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Solution

The fourth proportional to 445.15, 666.51 and 228.30 is: 341.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.15 : 666.51 = 228.30 : x
  2. Step 2: Convert to fraction form
    445.15/666.51 = 228.30/x
  3. Step 3: Cross multiply
    445.15x = 666.51 × 228.30
  4. Step 4: Simplify right side
    445.15x = 152,164.23
  5. Step 5: Solve for x
    x = 152,164.23/445.15
  6. Step 6: Final answer
    x = 341.83

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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.