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Finding the Fourth Proportional to 618,930.90, 854,123.94 and 346,998.87

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Solution

The fourth proportional to 618,930.90, 854,123.94 and 346,998.87 is: 478,858.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,930.90 : 854,123.94 = 346,998.87 : x
  2. Step 2: Convert to fraction form
    618,930.90/854,123.94 = 346,998.87/x
  3. Step 3: Cross multiply
    618,930.90x = 854,123.94 × 346,998.87
  4. Step 4: Simplify right side
    618,930.90x = 296,380,042,019.95
  5. Step 5: Solve for x
    x = 296,380,042,019.95/618,930.90
  6. Step 6: Final answer
    x = 478,858.05

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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.