Home / 405,568,014.40-608,352,021.60-391,235,291.20

Finding the Fourth Proportional to 405,568,014.40, 608,352,021.60 and 391,235,291.20

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Solution

The fourth proportional to 405,568,014.40, 608,352,021.60 and 391,235,291.20 is: 586,852,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,568,014.40 : 608,352,021.60 = 391,235,291.20 : x
  2. Step 2: Convert to fraction form
    405,568,014.40/608,352,021.60 = 391,235,291.20/x
  3. Step 3: Cross multiply
    405,568,014.40x = 608,352,021.60 × 391,235,291.20
  4. Step 4: Simplify right side
    405,568,014.40x = 238,008,780,322,784,704
  5. Step 5: Solve for x
    x = 238,008,780,322,784,704/405,568,014.40
  6. Step 6: Final answer
    x = 586,852,936.80

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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.