Home / 839,815,009.20-1,259,722,513.80-257,639,108.40

Finding the Fourth Proportional to 839,815,009.20, 1,259,722,513.80 and 257,639,108.40

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Solution

The fourth proportional to 839,815,009.20, 1,259,722,513.80 and 257,639,108.40 is: 386,458,662.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,815,009.20 : 1,259,722,513.80 = 257,639,108.40 : x
  2. Step 2: Convert to fraction form
    839,815,009.20/1,259,722,513.80 = 257,639,108.40/x
  3. Step 3: Cross multiply
    839,815,009.20x = 1,259,722,513.80 × 257,639,108.40
  4. Step 4: Simplify right side
    839,815,009.20x = 324,553,785,286,838,720
  5. Step 5: Solve for x
    x = 324,553,785,286,838,720/839,815,009.20
  6. Step 6: Final answer
    x = 386,458,662.60

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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.