Home / 821,609,154.22-1,133,942,323.89-520,222,478.65

Finding the Fourth Proportional to 821,609,154.22, 1,133,942,323.89 and 520,222,478.65

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Solution

The fourth proportional to 821,609,154.22, 1,133,942,323.89 and 520,222,478.65 is: 717,984,072.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,609,154.22 : 1,133,942,323.89 = 520,222,478.65 : x
  2. Step 2: Convert to fraction form
    821,609,154.22/1,133,942,323.89 = 520,222,478.65/x
  3. Step 3: Cross multiply
    821,609,154.22x = 1,133,942,323.89 × 520,222,478.65
  4. Step 4: Simplify right side
    821,609,154.22x = 589,902,286,380,196,992
  5. Step 5: Solve for x
    x = 589,902,286,380,196,992/821,609,154.22
  6. Step 6: Final answer
    x = 717,984,072.29

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1.5x scale

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.