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Finding the Fourth Proportional to 445.05, 614.12 and 258.57

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Solution

The fourth proportional to 445.05, 614.12 and 258.57 is: 356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.05 : 614.12 = 258.57 : x
  2. Step 2: Convert to fraction form
    445.05/614.12 = 258.57/x
  3. Step 3: Cross multiply
    445.05x = 614.12 × 258.57
  4. Step 4: Simplify right side
    445.05x = 158,791.72
  5. Step 5: Solve for x
    x = 158,791.72/445.05
  6. Step 6: Final answer
    x = 356.80

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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.