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Finding the Fourth Proportional to 354.03, 489.07 and 351.28

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Solution

The fourth proportional to 354.03, 489.07 and 351.28 is: 485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.03 : 489.07 = 351.28 : x
  2. Step 2: Convert to fraction form
    354.03/489.07 = 351.28/x
  3. Step 3: Cross multiply
    354.03x = 489.07 × 351.28
  4. Step 4: Simplify right side
    354.03x = 171,800.51
  5. Step 5: Solve for x
    x = 171,800.51/354.03
  6. Step 6: Final answer
    x = 485.27

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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.