Home / 679,308.28-1,019,420.64-279,940.21

Finding the Fourth Proportional to 679,308.28, 1,019,420.64 and 279,940.21

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Solution

The fourth proportional to 679,308.28, 1,019,420.64 and 279,940.21 is: 420,099.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,308.28 : 1,019,420.64 = 279,940.21 : x
  2. Step 2: Convert to fraction form
    679,308.28/1,019,420.64 = 279,940.21/x
  3. Step 3: Cross multiply
    679,308.28x = 1,019,420.64 × 279,940.21
  4. Step 4: Simplify right side
    679,308.28x = 285,376,825,491.38
  5. Step 5: Solve for x
    x = 285,376,825,491.38/679,308.28
  6. Step 6: Final answer
    x = 420,099.14

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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.