Home / 1,390,665,148.70-2,086,277,659.05-408,089,788.70

Finding the Fourth Proportional to 1,390,665,148.70, 2,086,277,659.05 and 408,089,788.70

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Solution

The fourth proportional to 1,390,665,148.70, 2,086,277,659.05 and 408,089,788.70 is: 612,216,830.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,665,148.70 : 2,086,277,659.05 = 408,089,788.70 : x
  2. Step 2: Convert to fraction form
    1,390,665,148.70/2,086,277,659.05 = 408,089,788.70/x
  3. Step 3: Cross multiply
    1,390,665,148.70x = 2,086,277,659.05 × 408,089,788.70
  4. Step 4: Simplify right side
    1,390,665,148.70x = 851,388,609,051,245,056
  5. Step 5: Solve for x
    x = 851,388,609,051,245,056/1,390,665,148.70
  6. Step 6: Final answer
    x = 612,216,830.09

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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.