Home / 1,285,112.40-1,927,085.40-486,128.40

Finding the Fourth Proportional to 1,285,112.40, 1,927,085.40 and 486,128.40

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Solution

The fourth proportional to 1,285,112.40, 1,927,085.40 and 486,128.40 is: 728,971.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,112.40 : 1,927,085.40 = 486,128.40 : x
  2. Step 2: Convert to fraction form
    1,285,112.40/1,927,085.40 = 486,128.40/x
  3. Step 3: Cross multiply
    1,285,112.40x = 1,927,085.40 × 486,128.40
  4. Step 4: Simplify right side
    1,285,112.40x = 936,810,942,165.36
  5. Step 5: Solve for x
    x = 936,810,942,165.36/1,285,112.40
  6. Step 6: Final answer
    x = 728,971.99

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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.