Home / 521,761,197.28-720,039,396.56-286,821,760

Finding the Fourth Proportional to 521,761,197.28, 720,039,396.56 and 286,821,760

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Solution

The fourth proportional to 521,761,197.28, 720,039,396.56 and 286,821,760 is: 395,818,945.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,761,197.28 : 720,039,396.56 = 286,821,760 : x
  2. Step 2: Convert to fraction form
    521,761,197.28/720,039,396.56 = 286,821,760/x
  3. Step 3: Cross multiply
    521,761,197.28x = 720,039,396.56 × 286,821,760
  4. Step 4: Simplify right side
    521,761,197.28x = 206,522,966,990,677,120
  5. Step 5: Solve for x
    x = 206,522,966,990,677,120/521,761,197.28
  6. Step 6: Final answer
    x = 395,818,945.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.