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Finding the Fourth Proportional to 640,704.80, 884,238.36 and 368,782.88

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Solution

The fourth proportional to 640,704.80, 884,238.36 and 368,782.88 is: 508,958.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,704.80 : 884,238.36 = 368,782.88 : x
  2. Step 2: Convert to fraction form
    640,704.80/884,238.36 = 368,782.88/x
  3. Step 3: Cross multiply
    640,704.80x = 884,238.36 × 368,782.88
  4. Step 4: Simplify right side
    640,704.80x = 326,091,969,007.28
  5. Step 5: Solve for x
    x = 326,091,969,007.28/640,704.80
  6. Step 6: Final answer
    x = 508,958.21

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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.