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Finding the Fourth Proportional to 1,890,200.40, 2,835,300.60 and 991,294.80

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Solution

The fourth proportional to 1,890,200.40, 2,835,300.60 and 991,294.80 is: 1,486,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890,200.40 : 2,835,300.60 = 991,294.80 : x
  2. Step 2: Convert to fraction form
    1,890,200.40/2,835,300.60 = 991,294.80/x
  3. Step 3: Cross multiply
    1,890,200.40x = 2,835,300.60 × 991,294.80
  4. Step 4: Simplify right side
    1,890,200.40x = 2,810,618,741,216.88
  5. Step 5: Solve for x
    x = 2,810,618,741,216.88/1,890,200.40
  6. Step 6: Final answer
    x = 1,486,942.20

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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.