Home / 1,321,057,682.40-1,981,082,638.80-400,628,114.40

Finding the Fourth Proportional to 1,321,057,682.40, 1,981,082,638.80 and 400,628,114.40

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Solution

The fourth proportional to 1,321,057,682.40, 1,981,082,638.80 and 400,628,114.40 is: 600,789,361.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,057,682.40 : 1,981,082,638.80 = 400,628,114.40 : x
  2. Step 2: Convert to fraction form
    1,321,057,682.40/1,981,082,638.80 = 400,628,114.40/x
  3. Step 3: Cross multiply
    1,321,057,682.40x = 1,981,082,638.80 × 400,628,114.40
  4. Step 4: Simplify right side
    1,321,057,682.40x = 793,677,402,053,020,160
  5. Step 5: Solve for x
    x = 793,677,402,053,020,160/1,321,057,682.40
  6. Step 6: Final answer
    x = 600,789,361.91

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1.5x scale

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.