Home / 321,431,443.60-443,669,793.96-209,939,328.88

Finding the Fourth Proportional to 321,431,443.60, 443,669,793.96 and 209,939,328.88

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Solution

The fourth proportional to 321,431,443.60, 443,669,793.96 and 209,939,328.88 is: 289,777,931.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,431,443.60 : 443,669,793.96 = 209,939,328.88 : x
  2. Step 2: Convert to fraction form
    321,431,443.60/443,669,793.96 = 209,939,328.88/x
  3. Step 3: Cross multiply
    321,431,443.60x = 443,669,793.96 × 209,939,328.88
  4. Step 4: Simplify right side
    321,431,443.60x = 93,143,738,788,290,272
  5. Step 5: Solve for x
    x = 93,143,738,788,290,272/321,431,443.60
  6. Step 6: Final answer
    x = 289,777,931.32

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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.