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Finding the Fourth Proportional to 403,978.44, 557,486.43 and 220,216.98

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Solution

The fourth proportional to 403,978.44, 557,486.43 and 220,216.98 is: 303,897.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,978.44 : 557,486.43 = 220,216.98 : x
  2. Step 2: Convert to fraction form
    403,978.44/557,486.43 = 220,216.98/x
  3. Step 3: Cross multiply
    403,978.44x = 557,486.43 × 220,216.98
  4. Step 4: Simplify right side
    403,978.44x = 122,767,978,005.58
  5. Step 5: Solve for x
    x = 122,767,978,005.58/403,978.44
  6. Step 6: Final answer
    x = 303,897.35

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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.