Home / 686,804.20-1,030,206.30-388,205.80

Finding the Fourth Proportional to 686,804.20, 1,030,206.30 and 388,205.80

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Solution

The fourth proportional to 686,804.20, 1,030,206.30 and 388,205.80 is: 582,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,804.20 : 1,030,206.30 = 388,205.80 : x
  2. Step 2: Convert to fraction form
    686,804.20/1,030,206.30 = 388,205.80/x
  3. Step 3: Cross multiply
    686,804.20x = 1,030,206.30 × 388,205.80
  4. Step 4: Simplify right side
    686,804.20x = 399,932,060,856.54
  5. Step 5: Solve for x
    x = 399,932,060,856.54/686,804.20
  6. Step 6: Final answer
    x = 582,308.70

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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.