Home / 1,390,665,169.20-2,086,277,689.80-408,089,809.20

Finding the Fourth Proportional to 1,390,665,169.20, 2,086,277,689.80 and 408,089,809.20

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Solution

The fourth proportional to 1,390,665,169.20, 2,086,277,689.80 and 408,089,809.20 is: 612,216,860.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,665,169.20 : 2,086,277,689.80 = 408,089,809.20 : x
  2. Step 2: Convert to fraction form
    1,390,665,169.20/2,086,277,689.80 = 408,089,809.20/x
  3. Step 3: Cross multiply
    1,390,665,169.20x = 2,086,277,689.80 × 408,089,809.20
  4. Step 4: Simplify right side
    1,390,665,169.20x = 851,388,664,368,698,752
  5. Step 5: Solve for x
    x = 851,388,664,368,698,752/1,390,665,169.20
  6. Step 6: Final answer
    x = 612,216,860.84

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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.