Home / 938,442,820.60-1,407,664,230.90-721,189,739.80

Finding the Fourth Proportional to 938,442,820.60, 1,407,664,230.90 and 721,189,739.80

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Solution

The fourth proportional to 938,442,820.60, 1,407,664,230.90 and 721,189,739.80 is: 1,081,784,609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,442,820.60 : 1,407,664,230.90 = 721,189,739.80 : x
  2. Step 2: Convert to fraction form
    938,442,820.60/1,407,664,230.90 = 721,189,739.80/x
  3. Step 3: Cross multiply
    938,442,820.60x = 1,407,664,230.90 × 721,189,739.80
  4. Step 4: Simplify right side
    938,442,820.60x = 1,015,193,000,408,538,112
  5. Step 5: Solve for x
    x = 1,015,193,000,408,538,112/938,442,820.60
  6. Step 6: Final answer
    x = 1,081,784,609.70

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1.5x scale

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.