Home / 687,289,189.17-948,490,313.39-405,043,542.21

Finding the Fourth Proportional to 687,289,189.17, 948,490,313.39 and 405,043,542.21

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Solution

The fourth proportional to 687,289,189.17, 948,490,313.39 and 405,043,542.21 is: 558,978,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,189.17 : 948,490,313.39 = 405,043,542.21 : x
  2. Step 2: Convert to fraction form
    687,289,189.17/948,490,313.39 = 405,043,542.21/x
  3. Step 3: Cross multiply
    687,289,189.17x = 948,490,313.39 × 405,043,542.21
  4. Step 4: Simplify right side
    687,289,189.17x = 384,179,876,285,069,120
  5. Step 5: Solve for x
    x = 384,179,876,285,069,120/687,289,189.17
  6. Step 6: Final answer
    x = 558,978,494.55

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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.