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Finding the Fourth Proportional to 351.05, 483.94 and 257.63

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Solution

The fourth proportional to 351.05, 483.94 and 257.63 is: 355.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.05 : 483.94 = 257.63 : x
  2. Step 2: Convert to fraction form
    351.05/483.94 = 257.63/x
  3. Step 3: Cross multiply
    351.05x = 483.94 × 257.63
  4. Step 4: Simplify right side
    351.05x = 124,675.61
  5. Step 5: Solve for x
    x = 124,675.61/351.05
  6. Step 6: Final answer
    x = 355.15

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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.