Home / 289,316.07-398,989.80-198,511.83

Finding the Fourth Proportional to 289,316.07, 398,989.80 and 198,511.83

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Solution

The fourth proportional to 289,316.07, 398,989.80 and 198,511.83 is: 273,763.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,316.07 : 398,989.80 = 198,511.83 : x
  2. Step 2: Convert to fraction form
    289,316.07/398,989.80 = 198,511.83/x
  3. Step 3: Cross multiply
    289,316.07x = 398,989.80 × 198,511.83
  4. Step 4: Simplify right side
    289,316.07x = 79,204,195,349.33
  5. Step 5: Solve for x
    x = 79,204,195,349.33/289,316.07
  6. Step 6: Final answer
    x = 273,763.55

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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.