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Finding the Fourth Proportional to 873,228.78, 1,205,053.92 and 491,256

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Solution

The fourth proportional to 873,228.78, 1,205,053.92 and 491,256 is: 677,932.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,228.78 : 1,205,053.92 = 491,256 : x
  2. Step 2: Convert to fraction form
    873,228.78/1,205,053.92 = 491,256/x
  3. Step 3: Cross multiply
    873,228.78x = 1,205,053.92 × 491,256
  4. Step 4: Simplify right side
    873,228.78x = 591,989,968,523.52
  5. Step 5: Solve for x
    x = 591,989,968,523.52/873,228.78
  6. Step 6: Final answer
    x = 677,932.27

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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.