Home / 679,919.94-1,019,419.83-380,607.12

Finding the Fourth Proportional to 679,919.94, 1,019,419.83 and 380,607.12

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Solution

The fourth proportional to 679,919.94, 1,019,419.83 and 380,607.12 is: 570,653.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,919.94 : 1,019,419.83 = 380,607.12 : x
  2. Step 2: Convert to fraction form
    679,919.94/1,019,419.83 = 380,607.12/x
  3. Step 3: Cross multiply
    679,919.94x = 1,019,419.83 × 380,607.12
  4. Step 4: Simplify right side
    679,919.94x = 387,998,445,567.19
  5. Step 5: Solve for x
    x = 387,998,445,567.19/679,919.94
  6. Step 6: Final answer
    x = 570,653.14

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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.