Home / 391,079,308.06-539,680,767.42-212,458,581.64

Finding the Fourth Proportional to 391,079,308.06, 539,680,767.42 and 212,458,581.64

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Solution

The fourth proportional to 391,079,308.06, 539,680,767.42 and 212,458,581.64 is: 293,188,128.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,079,308.06 : 539,680,767.42 = 212,458,581.64 : x
  2. Step 2: Convert to fraction form
    391,079,308.06/539,680,767.42 = 212,458,581.64/x
  3. Step 3: Cross multiply
    391,079,308.06x = 539,680,767.42 × 212,458,581.64
  4. Step 4: Simplify right side
    391,079,308.06x = 114,659,810,384,439,904
  5. Step 5: Solve for x
    x = 114,659,810,384,439,904/391,079,308.06
  6. Step 6: Final answer
    x = 293,188,128.40

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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.