Home / 679,309.28-1,019,422.14-279,941.21

Finding the Fourth Proportional to 679,309.28, 1,019,422.14 and 279,941.21

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Solution

The fourth proportional to 679,309.28, 1,019,422.14 and 279,941.21 is: 420,100.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,309.28 : 1,019,422.14 = 279,941.21 : x
  2. Step 2: Convert to fraction form
    679,309.28/1,019,422.14 = 279,941.21/x
  3. Step 3: Cross multiply
    679,309.28x = 1,019,422.14 × 279,941.21
  4. Step 4: Simplify right side
    679,309.28x = 285,378,267,372.39
  5. Step 5: Solve for x
    x = 285,378,267,372.39/679,309.28
  6. Step 6: Final answer
    x = 420,100.65

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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.