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Finding the Fourth Proportional to 1,339.55, 2,009.10 and 365.42

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Solution

The fourth proportional to 1,339.55, 2,009.10 and 365.42 is: 548.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.55 : 2,009.10 = 365.42 : x
  2. Step 2: Convert to fraction form
    1,339.55/2,009.10 = 365.42/x
  3. Step 3: Cross multiply
    1,339.55x = 2,009.10 × 365.42
  4. Step 4: Simplify right side
    1,339.55x = 734,163.49
  5. Step 5: Solve for x
    x = 734,163.49/1,339.55
  6. Step 6: Final answer
    x = 548.07

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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.