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Finding the Fourth Proportional to 351,607.40, 527,799.90 and 218,637.80

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Solution

The fourth proportional to 351,607.40, 527,799.90 and 218,637.80 is: 328,198.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,607.40 : 527,799.90 = 218,637.80 : x
  2. Step 2: Convert to fraction form
    351,607.40/527,799.90 = 218,637.80/x
  3. Step 3: Cross multiply
    351,607.40x = 527,799.90 × 218,637.80
  4. Step 4: Simplify right side
    351,607.40x = 115,397,008,976.22
  5. Step 5: Solve for x
    x = 115,397,008,976.22/351,607.40
  6. Step 6: Final answer
    x = 328,198.47

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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.