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Finding the Fourth Proportional to 303.93, 419.40 and 172.95

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Solution

The fourth proportional to 303.93, 419.40 and 172.95 is: 238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.93 : 419.40 = 172.95 : x
  2. Step 2: Convert to fraction form
    303.93/419.40 = 172.95/x
  3. Step 3: Cross multiply
    303.93x = 419.40 × 172.95
  4. Step 4: Simplify right side
    303.93x = 72,535.23
  5. Step 5: Solve for x
    x = 72,535.23/303.93
  6. Step 6: Final answer
    x = 238.66

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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.