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Finding the Fourth Proportional to 426,003.78, 638,866.92 and 141,618.06

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Solution

The fourth proportional to 426,003.78, 638,866.92 and 141,618.06 is: 212,380.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,003.78 : 638,866.92 = 141,618.06 : x
  2. Step 2: Convert to fraction form
    426,003.78/638,866.92 = 141,618.06/x
  3. Step 3: Cross multiply
    426,003.78x = 638,866.92 × 141,618.06
  4. Step 4: Simplify right side
    426,003.78x = 90,475,093,808.58
  5. Step 5: Solve for x
    x = 90,475,093,808.58/426,003.78
  6. Step 6: Final answer
    x = 212,380.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.