Home / 399,819.60-599,729.40-213,195.60

Finding the Fourth Proportional to 399,819.60, 599,729.40 and 213,195.60

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Solution

The fourth proportional to 399,819.60, 599,729.40 and 213,195.60 is: 319,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,819.60 : 599,729.40 = 213,195.60 : x
  2. Step 2: Convert to fraction form
    399,819.60/599,729.40 = 213,195.60/x
  3. Step 3: Cross multiply
    399,819.60x = 599,729.40 × 213,195.60
  4. Step 4: Simplify right side
    399,819.60x = 127,859,669,270.64
  5. Step 5: Solve for x
    x = 127,859,669,270.64/399,819.60
  6. Step 6: Final answer
    x = 319,793.40

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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.