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Finding the Fourth Proportional to 190.80, 285.60 and 172.52

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Solution

The fourth proportional to 190.80, 285.60 and 172.52 is: 258.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.80 : 285.60 = 172.52 : x
  2. Step 2: Convert to fraction form
    190.80/285.60 = 172.52/x
  3. Step 3: Cross multiply
    190.80x = 285.60 × 172.52
  4. Step 4: Simplify right side
    190.80x = 49,271.71
  5. Step 5: Solve for x
    x = 49,271.71/190.80
  6. Step 6: Final answer
    x = 258.24

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