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Finding the Fourth Proportional to 384.96, 579.60 and 339.60

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Solution

The fourth proportional to 384.96, 579.60 and 339.60 is: 511.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.96 : 579.60 = 339.60 : x
  2. Step 2: Convert to fraction form
    384.96/579.60 = 339.60/x
  3. Step 3: Cross multiply
    384.96x = 579.60 × 339.60
  4. Step 4: Simplify right side
    384.96x = 196,832.16
  5. Step 5: Solve for x
    x = 196,832.16/384.96
  6. Step 6: Final answer
    x = 511.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.