Home / 780,454,978.53-1,077,095,982.78-428,099,070.22

Finding the Fourth Proportional to 780,454,978.53, 1,077,095,982.78 and 428,099,070.22

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Solution

The fourth proportional to 780,454,978.53, 1,077,095,982.78 and 428,099,070.22 is: 590,814,078.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,454,978.53 : 1,077,095,982.78 = 428,099,070.22 : x
  2. Step 2: Convert to fraction form
    780,454,978.53/1,077,095,982.78 = 428,099,070.22/x
  3. Step 3: Cross multiply
    780,454,978.53x = 1,077,095,982.78 × 428,099,070.22
  4. Step 4: Simplify right side
    780,454,978.53x = 461,103,788,765,815,168
  5. Step 5: Solve for x
    x = 461,103,788,765,815,168/780,454,978.53
  6. Step 6: Final answer
    x = 590,814,078.26

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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.