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Finding the Fourth Proportional to 287,685.64, 431,674.22 and 191,688.48

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Solution

The fourth proportional to 287,685.64, 431,674.22 and 191,688.48 is: 287,629.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,685.64 : 431,674.22 = 191,688.48 : x
  2. Step 2: Convert to fraction form
    287,685.64/431,674.22 = 191,688.48/x
  3. Step 3: Cross multiply
    287,685.64x = 431,674.22 × 191,688.48
  4. Step 4: Simplify right side
    287,685.64x = 82,746,975,086.99
  5. Step 5: Solve for x
    x = 82,746,975,086.99/287,685.64
  6. Step 6: Final answer
    x = 287,629.84

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1.5x scale

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.