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Finding the Fourth Proportional to 228.79, 315.40 and 151.03

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Solution

The fourth proportional to 228.79, 315.40 and 151.03 is: 208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.79 : 315.40 = 151.03 : x
  2. Step 2: Convert to fraction form
    228.79/315.40 = 151.03/x
  3. Step 3: Cross multiply
    228.79x = 315.40 × 151.03
  4. Step 4: Simplify right side
    228.79x = 47,634.86
  5. Step 5: Solve for x
    x = 47,634.86/228.79
  6. Step 6: Final answer
    x = 208.20

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.