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Finding the Fourth Proportional to 399,307.66, 551,028.82 and 218,027.22

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Solution

The fourth proportional to 399,307.66, 551,028.82 and 218,027.22 is: 300,868.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,307.66 : 551,028.82 = 218,027.22 : x
  2. Step 2: Convert to fraction form
    399,307.66/551,028.82 = 218,027.22/x
  3. Step 3: Cross multiply
    399,307.66x = 551,028.82 × 218,027.22
  4. Step 4: Simplify right side
    399,307.66x = 120,139,281,764.48
  5. Step 5: Solve for x
    x = 120,139,281,764.48/399,307.66
  6. Step 6: Final answer
    x = 300,868.96

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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.