Home / 521,769,906.88-720,121,179.52-318,203,360.46

Finding the Fourth Proportional to 521,769,906.88, 720,121,179.52 and 318,203,360.46

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Solution

The fourth proportional to 521,769,906.88, 720,121,179.52 and 318,203,360.46 is: 439,168,637.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,769,906.88 : 720,121,179.52 = 318,203,360.46 : x
  2. Step 2: Convert to fraction form
    521,769,906.88/720,121,179.52 = 318,203,360.46/x
  3. Step 3: Cross multiply
    521,769,906.88x = 720,121,179.52 × 318,203,360.46
  4. Step 4: Simplify right side
    521,769,906.88x = 229,144,979,263,189,280
  5. Step 5: Solve for x
    x = 229,144,979,263,189,280/521,769,906.88
  6. Step 6: Final answer
    x = 439,168,637.82

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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.