Home / 621,348,990.36-857,479,785.60-339,109,533.78

Finding the Fourth Proportional to 621,348,990.36, 857,479,785.60 and 339,109,533.78

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Solution

The fourth proportional to 621,348,990.36, 857,479,785.60 and 339,109,533.78 is: 467,981,078.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,348,990.36 : 857,479,785.60 = 339,109,533.78 : x
  2. Step 2: Convert to fraction form
    621,348,990.36/857,479,785.60 = 339,109,533.78/x
  3. Step 3: Cross multiply
    621,348,990.36x = 857,479,785.60 × 339,109,533.78
  4. Step 4: Simplify right side
    621,348,990.36x = 290,779,570,320,590,336
  5. Step 5: Solve for x
    x = 290,779,570,320,590,336/621,348,990.36
  6. Step 6: Final answer
    x = 467,981,078.00

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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.