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Finding the Fourth Proportional to 365.40, 548.70 and 263.40

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Solution

The fourth proportional to 365.40, 548.70 and 263.40 is: 395.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.40 : 548.70 = 263.40 : x
  2. Step 2: Convert to fraction form
    365.40/548.70 = 263.40/x
  3. Step 3: Cross multiply
    365.40x = 548.70 × 263.40
  4. Step 4: Simplify right side
    365.40x = 144,527.58
  5. Step 5: Solve for x
    x = 144,527.58/365.40
  6. Step 6: Final answer
    x = 395.53

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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.