Home / 1,389,928.09-2,086,240.32-670,775.89

Finding the Fourth Proportional to 1,389,928.09, 2,086,240.32 and 670,775.89

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Solution

The fourth proportional to 1,389,928.09, 2,086,240.32 and 670,775.89 is: 1,006,814.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,928.09 : 2,086,240.32 = 670,775.89 : x
  2. Step 2: Convert to fraction form
    1,389,928.09/2,086,240.32 = 670,775.89/x
  3. Step 3: Cross multiply
    1,389,928.09x = 2,086,240.32 × 670,775.89
  4. Step 4: Simplify right side
    1,389,928.09x = 1,399,399,696,970.68
  5. Step 5: Solve for x
    x = 1,399,399,696,970.68/1,389,928.09
  6. Step 6: Final answer
    x = 1,006,814.46

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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.