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Finding the Fourth Proportional to 388.86, 579.72 and 364.56

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Solution

The fourth proportional to 388.86, 579.72 and 364.56 is: 543.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.86 : 579.72 = 364.56 : x
  2. Step 2: Convert to fraction form
    388.86/579.72 = 364.56/x
  3. Step 3: Cross multiply
    388.86x = 579.72 × 364.56
  4. Step 4: Simplify right side
    388.86x = 211,342.72
  5. Step 5: Solve for x
    x = 211,342.72/388.86
  6. Step 6: Final answer
    x = 543.49

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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.