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Finding the Fourth Proportional to 640,662.36, 884,336.70 and 368,838.59

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Solution

The fourth proportional to 640,662.36, 884,336.70 and 368,838.59 is: 509,125.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,662.36 : 884,336.70 = 368,838.59 : x
  2. Step 2: Convert to fraction form
    640,662.36/884,336.70 = 368,838.59/x
  3. Step 3: Cross multiply
    640,662.36x = 884,336.70 × 368,838.59
  4. Step 4: Simplify right side
    640,662.36x = 326,177,501,513.25
  5. Step 5: Solve for x
    x = 326,177,501,513.25/640,662.36
  6. Step 6: Final answer
    x = 509,125.43

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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.