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Finding the Fourth Proportional to 551,415.80, 827,123.70 and 218,991.80

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Solution

The fourth proportional to 551,415.80, 827,123.70 and 218,991.80 is: 328,487.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,415.80 : 827,123.70 = 218,991.80 : x
  2. Step 2: Convert to fraction form
    551,415.80/827,123.70 = 218,991.80/x
  3. Step 3: Cross multiply
    551,415.80x = 827,123.70 × 218,991.80
  4. Step 4: Simplify right side
    551,415.80x = 181,133,307,885.66
  5. Step 5: Solve for x
    x = 181,133,307,885.66/551,415.80
  6. Step 6: Final answer
    x = 328,487.70

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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.