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Finding the Fourth Proportional to 351.25, 485.52 and 320.06

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Solution

The fourth proportional to 351.25, 485.52 and 320.06 is: 442.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.25 : 485.52 = 320.06 : x
  2. Step 2: Convert to fraction form
    351.25/485.52 = 320.06/x
  3. Step 3: Cross multiply
    351.25x = 485.52 × 320.06
  4. Step 4: Simplify right side
    351.25x = 155,395.53
  5. Step 5: Solve for x
    x = 155,395.53/351.25
  6. Step 6: Final answer
    x = 442.41

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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.