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Finding the Fourth Proportional to 365.40, 548.10 and 361.80

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Solution

The fourth proportional to 365.40, 548.10 and 361.80 is: 542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.40 : 548.10 = 361.80 : x
  2. Step 2: Convert to fraction form
    365.40/548.10 = 361.80/x
  3. Step 3: Cross multiply
    365.40x = 548.10 × 361.80
  4. Step 4: Simplify right side
    365.40x = 198,302.58
  5. Step 5: Solve for x
    x = 198,302.58/365.40
  6. Step 6: Final answer
    x = 542.70

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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.