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Finding the Fourth Proportional to 324,866.20, 487,226.40 and 213,329.20

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Solution

The fourth proportional to 324,866.20, 487,226.40 and 213,329.20 is: 319,945.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,866.20 : 487,226.40 = 213,329.20 : x
  2. Step 2: Convert to fraction form
    324,866.20/487,226.40 = 213,329.20/x
  3. Step 3: Cross multiply
    324,866.20x = 487,226.40 × 213,329.20
  4. Step 4: Simplify right side
    324,866.20x = 103,939,618,130.88
  5. Step 5: Solve for x
    x = 103,939,618,130.88/324,866.20
  6. Step 6: Final answer
    x = 319,945.93

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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.