Home / 989,141.80-1,387,947.80-989,141.80

Finding the Fourth Proportional to 989,141.80, 1,387,947.80 and 989,141.80

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Solution

The fourth proportional to 989,141.80, 1,387,947.80 and 989,141.80 is: 1,387,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,141.80 : 1,387,947.80 = 989,141.80 : x
  2. Step 2: Convert to fraction form
    989,141.80/1,387,947.80 = 989,141.80/x
  3. Step 3: Cross multiply
    989,141.80x = 1,387,947.80 × 989,141.80
  4. Step 4: Simplify right side
    989,141.80x = 1,372,877,185,198.04
  5. Step 5: Solve for x
    x = 1,372,877,185,198.04/989,141.80
  6. Step 6: Final answer
    x = 1,387,947.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.