Home / 1,321,005,144.80-1,981,507,717.20-400,880,007.20

Finding the Fourth Proportional to 1,321,005,144.80, 1,981,507,717.20 and 400,880,007.20

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Solution

The fourth proportional to 1,321,005,144.80, 1,981,507,717.20 and 400,880,007.20 is: 601,320,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,005,144.80 : 1,981,507,717.20 = 400,880,007.20 : x
  2. Step 2: Convert to fraction form
    1,321,005,144.80/1,981,507,717.20 = 400,880,007.20/x
  3. Step 3: Cross multiply
    1,321,005,144.80x = 1,981,507,717.20 × 400,880,007.20
  4. Step 4: Simplify right side
    1,321,005,144.80x = 794,346,827,937,991,552
  5. Step 5: Solve for x
    x = 794,346,827,937,991,552/1,321,005,144.80
  6. Step 6: Final answer
    x = 601,320,010.80

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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.