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Finding the Fourth Proportional to 282,339.36, 389,629.08 and 155,023.20

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Solution

The fourth proportional to 282,339.36, 389,629.08 and 155,023.20 is: 213,932.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,339.36 : 389,629.08 = 155,023.20 : x
  2. Step 2: Convert to fraction form
    282,339.36/389,629.08 = 155,023.20/x
  3. Step 3: Cross multiply
    282,339.36x = 389,629.08 × 155,023.20
  4. Step 4: Simplify right side
    282,339.36x = 60,401,546,794.66
  5. Step 5: Solve for x
    x = 60,401,546,794.66/282,339.36
  6. Step 6: Final answer
    x = 213,932.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.