Home / 1,331,431.80-1,997,147.70-1,118,855.40

Finding the Fourth Proportional to 1,331,431.80, 1,997,147.70 and 1,118,855.40

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Solution

The fourth proportional to 1,331,431.80, 1,997,147.70 and 1,118,855.40 is: 1,678,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331,431.80 : 1,997,147.70 = 1,118,855.40 : x
  2. Step 2: Convert to fraction form
    1,331,431.80/1,997,147.70 = 1,118,855.40/x
  3. Step 3: Cross multiply
    1,331,431.80x = 1,997,147.70 × 1,118,855.40
  4. Step 4: Simplify right side
    1,331,431.80x = 2,234,519,488,742.58
  5. Step 5: Solve for x
    x = 2,234,519,488,742.58/1,331,431.80
  6. Step 6: Final answer
    x = 1,678,283.10

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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.