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Finding the Fourth Proportional to 288,613.79, 398,288.50 and 161,291.51

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Solution

The fourth proportional to 288,613.79, 398,288.50 and 161,291.51 is: 222,583.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,613.79 : 398,288.50 = 161,291.51 : x
  2. Step 2: Convert to fraction form
    288,613.79/398,288.50 = 161,291.51/x
  3. Step 3: Cross multiply
    288,613.79x = 398,288.50 × 161,291.51
  4. Step 4: Simplify right side
    288,613.79x = 64,240,551,185.96
  5. Step 5: Solve for x
    x = 64,240,551,185.96/288,613.79
  6. Step 6: Final answer
    x = 222,583.10

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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.