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Finding the Fourth Proportional to 365.60, 548.40 and 331.40

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Solution

The fourth proportional to 365.60, 548.40 and 331.40 is: 497.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.60 : 548.40 = 331.40 : x
  2. Step 2: Convert to fraction form
    365.60/548.40 = 331.40/x
  3. Step 3: Cross multiply
    365.60x = 548.40 × 331.40
  4. Step 4: Simplify right side
    365.60x = 181,739.76
  5. Step 5: Solve for x
    x = 181,739.76/365.60
  6. Step 6: Final answer
    x = 497.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.