Home / 1,115,150,721.21-1,538,908,784.55-613,397,679.48

Finding the Fourth Proportional to 1,115,150,721.21, 1,538,908,784.55 and 613,397,679.48

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Solution

The fourth proportional to 1,115,150,721.21, 1,538,908,784.55 and 613,397,679.48 is: 846,489,231.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115,150,721.21 : 1,538,908,784.55 = 613,397,679.48 : x
  2. Step 2: Convert to fraction form
    1,115,150,721.21/1,538,908,784.55 = 613,397,679.48/x
  3. Step 3: Cross multiply
    1,115,150,721.21x = 1,538,908,784.55 × 613,397,679.48
  4. Step 4: Simplify right side
    1,115,150,721.21x = 943,963,077,374,357,248
  5. Step 5: Solve for x
    x = 943,963,077,374,357,248/1,115,150,721.21
  6. Step 6: Final answer
    x = 846,489,231.83

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Double scale
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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.