Home / 1,990,676.40-2,980,109.70-1,317,517.80

Finding the Fourth Proportional to 1,990,676.40, 2,980,109.70 and 1,317,517.80

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Solution

The fourth proportional to 1,990,676.40, 2,980,109.70 and 1,317,517.80 is: 1,972,368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,676.40 : 2,980,109.70 = 1,317,517.80 : x
  2. Step 2: Convert to fraction form
    1,990,676.40/2,980,109.70 = 1,317,517.80/x
  3. Step 3: Cross multiply
    1,990,676.40x = 2,980,109.70 × 1,317,517.80
  4. Step 4: Simplify right side
    1,990,676.40x = 3,926,347,575,702.66
  5. Step 5: Solve for x
    x = 3,926,347,575,702.66/1,990,676.40
  6. Step 6: Final answer
    x = 1,972,368.58

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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.