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Finding the Fourth Proportional to 718,015.94, 990,900.97 and 412,089.87

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Solution

The fourth proportional to 718,015.94, 990,900.97 and 412,089.87 is: 568,706.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,015.94 : 990,900.97 = 412,089.87 : x
  2. Step 2: Convert to fraction form
    718,015.94/990,900.97 = 412,089.87/x
  3. Step 3: Cross multiply
    718,015.94x = 990,900.97 × 412,089.87
  4. Step 4: Simplify right side
    718,015.94x = 408,340,250,879.95
  5. Step 5: Solve for x
    x = 408,340,250,879.95/718,015.94
  6. Step 6: Final answer
    x = 568,706.39

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1.5x scale

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.