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Finding the Fourth Proportional to 213,129.40, 319,233.30 and 189,782.20

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Solution

The fourth proportional to 213,129.40, 319,233.30 and 189,782.20 is: 284,262.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,129.40 : 319,233.30 = 189,782.20 : x
  2. Step 2: Convert to fraction form
    213,129.40/319,233.30 = 189,782.20/x
  3. Step 3: Cross multiply
    213,129.40x = 319,233.30 × 189,782.20
  4. Step 4: Simplify right side
    213,129.40x = 60,584,797,987.26
  5. Step 5: Solve for x
    x = 60,584,797,987.26/213,129.40
  6. Step 6: Final answer
    x = 284,262.98

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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.