Home / 1,285,912.60-1,928,139.90-487,220.20

Finding the Fourth Proportional to 1,285,912.60, 1,928,139.90 and 487,220.20

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Solution

The fourth proportional to 1,285,912.60, 1,928,139.90 and 487,220.20 is: 730,554.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,912.60 : 1,928,139.90 = 487,220.20 : x
  2. Step 2: Convert to fraction form
    1,285,912.60/1,928,139.90 = 487,220.20/x
  3. Step 3: Cross multiply
    1,285,912.60x = 1,928,139.90 × 487,220.20
  4. Step 4: Simplify right side
    1,285,912.60x = 939,428,707,705.98
  5. Step 5: Solve for x
    x = 939,428,707,705.98/1,285,912.60
  6. Step 6: Final answer
    x = 730,554.09

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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.