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Finding the Fourth Proportional to 388.68, 579.81 and 366.60

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Solution

The fourth proportional to 388.68, 579.81 and 366.60 is: 546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.68 : 579.81 = 366.60 : x
  2. Step 2: Convert to fraction form
    388.68/579.81 = 366.60/x
  3. Step 3: Cross multiply
    388.68x = 579.81 × 366.60
  4. Step 4: Simplify right side
    388.68x = 212,558.35
  5. Step 5: Solve for x
    x = 212,558.35/388.68
  6. Step 6: Final answer
    x = 546.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.