Home / 1,214,005.80-1,821,008.70-989,619.60

Finding the Fourth Proportional to 1,214,005.80, 1,821,008.70 and 989,619.60

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Solution

The fourth proportional to 1,214,005.80, 1,821,008.70 and 989,619.60 is: 1,484,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,005.80 : 1,821,008.70 = 989,619.60 : x
  2. Step 2: Convert to fraction form
    1,214,005.80/1,821,008.70 = 989,619.60/x
  3. Step 3: Cross multiply
    1,214,005.80x = 1,821,008.70 × 989,619.60
  4. Step 4: Simplify right side
    1,214,005.80x = 1,802,105,901,290.52
  5. Step 5: Solve for x
    x = 1,802,105,901,290.52/1,214,005.80
  6. Step 6: Final answer
    x = 1,484,429.40

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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.