Home / 840,117,811.20-1,258,161,177.60-408,792,422.40

Finding the Fourth Proportional to 840,117,811.20, 1,258,161,177.60 and 408,792,422.40

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Solution

The fourth proportional to 840,117,811.20, 1,258,161,177.60 and 408,792,422.40 is: 612,207,893.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,117,811.20 : 1,258,161,177.60 = 408,792,422.40 : x
  2. Step 2: Convert to fraction form
    840,117,811.20/1,258,161,177.60 = 408,792,422.40/x
  3. Step 3: Cross multiply
    840,117,811.20x = 1,258,161,177.60 × 408,792,422.40
  4. Step 4: Simplify right side
    840,117,811.20x = 514,326,755,560,740,544
  5. Step 5: Solve for x
    x = 514,326,755,560,740,544/840,117,811.20
  6. Step 6: Final answer
    x = 612,207,893.59

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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.