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Finding the Fourth Proportional to 443.96, 612.73 and 257.51

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Solution

The fourth proportional to 443.96, 612.73 and 257.51 is: 355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.96 : 612.73 = 257.51 : x
  2. Step 2: Convert to fraction form
    443.96/612.73 = 257.51/x
  3. Step 3: Cross multiply
    443.96x = 612.73 × 257.51
  4. Step 4: Simplify right side
    443.96x = 157,785.96
  5. Step 5: Solve for x
    x = 157,785.96/443.96
  6. Step 6: Final answer
    x = 355.40

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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.