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Finding the Fourth Proportional to 1,339.47, 2,009.21 and 365.58

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Solution

The fourth proportional to 1,339.47, 2,009.21 and 365.58 is: 548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.47 : 2,009.21 = 365.58 : x
  2. Step 2: Convert to fraction form
    1,339.47/2,009.21 = 365.58/x
  3. Step 3: Cross multiply
    1,339.47x = 2,009.21 × 365.58
  4. Step 4: Simplify right side
    1,339.47x = 734,525.16
  5. Step 5: Solve for x
    x = 734,525.16/1,339.47
  6. Step 6: Final answer
    x = 548.37

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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.