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Finding the Fourth Proportional to 665,617,831.92, 996,483,992.01 and 388,419,606

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Solution

The fourth proportional to 665,617,831.92, 996,483,992.01 and 388,419,606 is: 581,495,718.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,617,831.92 : 996,483,992.01 = 388,419,606 : x
  2. Step 2: Convert to fraction form
    665,617,831.92/996,483,992.01 = 388,419,606/x
  3. Step 3: Cross multiply
    665,617,831.92x = 996,483,992.01 × 388,419,606
  4. Step 4: Simplify right side
    665,617,831.92x = 387,053,919,561,831,360
  5. Step 5: Solve for x
    x = 387,053,919,561,831,360/665,617,831.92
  6. Step 6: Final answer
    x = 581,495,718.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.