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Finding the Fourth Proportional to 445.32, 614.61 and 258.81

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Solution

The fourth proportional to 445.32, 614.61 and 258.81 is: 357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.32 : 614.61 = 258.81 : x
  2. Step 2: Convert to fraction form
    445.32/614.61 = 258.81/x
  3. Step 3: Cross multiply
    445.32x = 614.61 × 258.81
  4. Step 4: Simplify right side
    445.32x = 159,067.21
  5. Step 5: Solve for x
    x = 159,067.21/445.32
  6. Step 6: Final answer
    x = 357.20

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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.