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Finding the Fourth Proportional to 443.51, 612.11 and 257.01

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Solution

The fourth proportional to 443.51, 612.11 and 257.01 is: 354.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.51 : 612.11 = 257.01 : x
  2. Step 2: Convert to fraction form
    443.51/612.11 = 257.01/x
  3. Step 3: Cross multiply
    443.51x = 612.11 × 257.01
  4. Step 4: Simplify right side
    443.51x = 157,318.39
  5. Step 5: Solve for x
    x = 157,318.39/443.51
  6. Step 6: Final answer
    x = 354.71

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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.