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Finding the Fourth Proportional to 618,815.84, 928,488.42 and 259,070.73

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Solution

The fourth proportional to 618,815.84, 928,488.42 and 259,070.73 is: 388,716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,815.84 : 928,488.42 = 259,070.73 : x
  2. Step 2: Convert to fraction form
    618,815.84/928,488.42 = 259,070.73/x
  3. Step 3: Cross multiply
    618,815.84x = 928,488.42 × 259,070.73
  4. Step 4: Simplify right side
    618,815.84x = 240,544,172,765.95
  5. Step 5: Solve for x
    x = 240,544,172,765.95/618,815.84
  6. Step 6: Final answer
    x = 388,716.90

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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.