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Finding the Fourth Proportional to 386.04, 532.74 and 228.66

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Solution

The fourth proportional to 386.04, 532.74 and 228.66 is: 315.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.04 : 532.74 = 228.66 : x
  2. Step 2: Convert to fraction form
    386.04/532.74 = 228.66/x
  3. Step 3: Cross multiply
    386.04x = 532.74 × 228.66
  4. Step 4: Simplify right side
    386.04x = 121,816.33
  5. Step 5: Solve for x
    x = 121,816.33/386.04
  6. Step 6: Final answer
    x = 315.55

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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.