Home / 1,287,968.40-1,932,171.30-688,766.85

Finding the Fourth Proportional to 1,287,968.40, 1,932,171.30 and 688,766.85

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Solution

The fourth proportional to 1,287,968.40, 1,932,171.30 and 688,766.85 is: 1,033,267.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,968.40 : 1,932,171.30 = 688,766.85 : x
  2. Step 2: Convert to fraction form
    1,287,968.40/1,932,171.30 = 688,766.85/x
  3. Step 3: Cross multiply
    1,287,968.40x = 1,932,171.30 × 688,766.85
  4. Step 4: Simplify right side
    1,287,968.40x = 1,330,815,539,961.41
  5. Step 5: Solve for x
    x = 1,330,815,539,961.41/1,287,968.40
  6. Step 6: Final answer
    x = 1,033,267.23

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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.