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Finding the Fourth Proportional to 640,782.51, 884,244.54 and 354,283.70

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Solution

The fourth proportional to 640,782.51, 884,244.54 and 354,283.70 is: 488,891.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,782.51 : 884,244.54 = 354,283.70 : x
  2. Step 2: Convert to fraction form
    640,782.51/884,244.54 = 354,283.70/x
  3. Step 3: Cross multiply
    640,782.51x = 884,244.54 × 354,283.70
  4. Step 4: Simplify right side
    640,782.51x = 313,273,422,914.78
  5. Step 5: Solve for x
    x = 313,273,422,914.78/640,782.51
  6. Step 6: Final answer
    x = 488,891.97

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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.