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Finding the Fourth Proportional to 445.39, 666.69 and 307.63

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Solution

The fourth proportional to 445.39, 666.69 and 307.63 is: 460.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.39 : 666.69 = 307.63 : x
  2. Step 2: Convert to fraction form
    445.39/666.69 = 307.63/x
  3. Step 3: Cross multiply
    445.39x = 666.69 × 307.63
  4. Step 4: Simplify right side
    445.39x = 205,093.84
  5. Step 5: Solve for x
    x = 205,093.84/445.39
  6. Step 6: Final answer
    x = 460.48

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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.