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Finding the Fourth Proportional to 319.88, 480 and 114.62

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Solution

The fourth proportional to 319.88, 480 and 114.62 is: 172.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.88 : 480 = 114.62 : x
  2. Step 2: Convert to fraction form
    319.88/480 = 114.62/x
  3. Step 3: Cross multiply
    319.88x = 480 × 114.62
  4. Step 4: Simplify right side
    319.88x = 55,017.60
  5. Step 5: Solve for x
    x = 55,017.60/319.88
  6. Step 6: Final answer
    x = 172.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.