Home / 1,405,865.20-2,103,882.60-1,287,900.40

Finding the Fourth Proportional to 1,405,865.20, 2,103,882.60 and 1,287,900.40

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Solution

The fourth proportional to 1,405,865.20, 2,103,882.60 and 1,287,900.40 is: 1,927,347.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,865.20 : 2,103,882.60 = 1,287,900.40 : x
  2. Step 2: Convert to fraction form
    1,405,865.20/2,103,882.60 = 1,287,900.40/x
  3. Step 3: Cross multiply
    1,405,865.20x = 2,103,882.60 × 1,287,900.40
  4. Step 4: Simplify right side
    1,405,865.20x = 2,709,591,242,093.04
  5. Step 5: Solve for x
    x = 2,709,591,242,093.04/1,405,865.20
  6. Step 6: Final answer
    x = 1,927,347.83

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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.