Home / 1,078,188.20-1,618,448.70-679,279.40

Finding the Fourth Proportional to 1,078,188.20, 1,618,448.70 and 679,279.40

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Solution

The fourth proportional to 1,078,188.20, 1,618,448.70 and 679,279.40 is: 1,019,653.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,188.20 : 1,618,448.70 = 679,279.40 : x
  2. Step 2: Convert to fraction form
    1,078,188.20/1,618,448.70 = 679,279.40/x
  3. Step 3: Cross multiply
    1,078,188.20x = 1,618,448.70 × 679,279.40
  4. Step 4: Simplify right side
    1,078,188.20x = 1,099,378,861,866.78
  5. Step 5: Solve for x
    x = 1,099,378,861,866.78/1,078,188.20
  6. Step 6: Final answer
    x = 1,019,653.95

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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.