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Finding the Fourth Proportional to 640,067.43, 883,319.89 and 368,135.40

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Solution

The fourth proportional to 640,067.43, 883,319.89 and 368,135.40 is: 508,042.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,067.43 : 883,319.89 = 368,135.40 : x
  2. Step 2: Convert to fraction form
    640,067.43/883,319.89 = 368,135.40/x
  3. Step 3: Cross multiply
    640,067.43x = 883,319.89 × 368,135.40
  4. Step 4: Simplify right side
    640,067.43x = 325,181,324,161.74
  5. Step 5: Solve for x
    x = 325,181,324,161.74/640,067.43
  6. Step 6: Final answer
    x = 508,042.29

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1.5x scale

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.