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Finding the Fourth Proportional to 579,556.80, 869,488.80 and 205,540.80

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Solution

The fourth proportional to 579,556.80, 869,488.80 and 205,540.80 is: 308,365.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,556.80 : 869,488.80 = 205,540.80 : x
  2. Step 2: Convert to fraction form
    579,556.80/869,488.80 = 205,540.80/x
  3. Step 3: Cross multiply
    579,556.80x = 869,488.80 × 205,540.80
  4. Step 4: Simplify right side
    579,556.80x = 178,715,423,543.04
  5. Step 5: Solve for x
    x = 178,715,423,543.04/579,556.80
  6. Step 6: Final answer
    x = 308,365.67

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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.