Home / 639,438,639.16-882,446,719.26-391,872,183.16

Finding the Fourth Proportional to 639,438,639.16, 882,446,719.26 and 391,872,183.16

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Solution

The fourth proportional to 639,438,639.16, 882,446,719.26 and 391,872,183.16 is: 540,796,725.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,438,639.16 : 882,446,719.26 = 391,872,183.16 : x
  2. Step 2: Convert to fraction form
    639,438,639.16/882,446,719.26 = 391,872,183.16/x
  3. Step 3: Cross multiply
    639,438,639.16x = 882,446,719.26 × 391,872,183.16
  4. Step 4: Simplify right side
    639,438,639.16x = 345,806,322,398,795,840
  5. Step 5: Solve for x
    x = 345,806,322,398,795,840/639,438,639.16
  6. Step 6: Final answer
    x = 540,796,725.79

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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.