Home / 807,427.85-1,211,890.82-408,351.38

Finding the Fourth Proportional to 807,427.85, 1,211,890.82 and 408,351.38

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Solution

The fourth proportional to 807,427.85, 1,211,890.82 and 408,351.38 is: 612,905.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,427.85 : 1,211,890.82 = 408,351.38 : x
  2. Step 2: Convert to fraction form
    807,427.85/1,211,890.82 = 408,351.38/x
  3. Step 3: Cross multiply
    807,427.85x = 1,211,890.82 × 408,351.38
  4. Step 4: Simplify right side
    807,427.85x = 494,877,280,655.12
  5. Step 5: Solve for x
    x = 494,877,280,655.12/807,427.85
  6. Step 6: Final answer
    x = 612,905.89

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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.