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Finding the Fourth Proportional to 445.07, 614.12 and 258.57

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Solution

The fourth proportional to 445.07, 614.12 and 258.57 is: 356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.07 : 614.12 = 258.57 : x
  2. Step 2: Convert to fraction form
    445.07/614.12 = 258.57/x
  3. Step 3: Cross multiply
    445.07x = 614.12 × 258.57
  4. Step 4: Simplify right side
    445.07x = 158,789.94
  5. Step 5: Solve for x
    x = 158,789.94/445.07
  6. Step 6: Final answer
    x = 356.78

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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.