Home / 1,989,389.69-2,981,038.80-1,338,555.20

Finding the Fourth Proportional to 1,989,389.69, 2,981,038.80 and 1,338,555.20

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Solution

The fourth proportional to 1,989,389.69, 2,981,038.80 and 1,338,555.20 is: 2,005,783.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,389.69 : 2,981,038.80 = 1,338,555.20 : x
  2. Step 2: Convert to fraction form
    1,989,389.69/2,981,038.80 = 1,338,555.20/x
  3. Step 3: Cross multiply
    1,989,389.69x = 2,981,038.80 × 1,338,555.20
  4. Step 4: Simplify right side
    1,989,389.69x = 3,990,284,994,594.36
  5. Step 5: Solve for x
    x = 3,990,284,994,594.36/1,989,389.69
  6. Step 6: Final answer
    x = 2,005,783.49

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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.