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Finding the Fourth Proportional to 640,067.69, 883,320.24 and 368,135.66

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Solution

The fourth proportional to 640,067.69, 883,320.24 and 368,135.66 is: 508,042.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,067.69 : 883,320.24 = 368,135.66 : x
  2. Step 2: Convert to fraction form
    640,067.69/883,320.24 = 368,135.66/x
  3. Step 3: Cross multiply
    640,067.69x = 883,320.24 × 368,135.66
  4. Step 4: Simplify right side
    640,067.69x = 325,181,675,127.16
  5. Step 5: Solve for x
    x = 325,181,675,127.16/640,067.69
  6. Step 6: Final answer
    x = 508,042.64

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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.