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Finding the Fourth Proportional to 288,975.03, 398,806.56 and 161,691.63

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Solution

The fourth proportional to 288,975.03, 398,806.56 and 161,691.63 is: 223,146.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,975.03 : 398,806.56 = 161,691.63 : x
  2. Step 2: Convert to fraction form
    288,975.03/398,806.56 = 161,691.63/x
  3. Step 3: Cross multiply
    288,975.03x = 398,806.56 × 161,691.63
  4. Step 4: Simplify right side
    288,975.03x = 64,483,682,741.09
  5. Step 5: Solve for x
    x = 64,483,682,741.09/288,975.03
  6. Step 6: Final answer
    x = 223,146.21

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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.