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Finding the Fourth Proportional to 287,903.20, 397,348.80 and 186,166.78

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Solution

The fourth proportional to 287,903.20, 397,348.80 and 186,166.78 is: 256,937.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,903.20 : 397,348.80 = 186,166.78 : x
  2. Step 2: Convert to fraction form
    287,903.20/397,348.80 = 186,166.78/x
  3. Step 3: Cross multiply
    287,903.20x = 397,348.80 × 186,166.78
  4. Step 4: Simplify right side
    287,903.20x = 73,973,146,632.86
  5. Step 5: Solve for x
    x = 73,973,146,632.86/287,903.20
  6. Step 6: Final answer
    x = 256,937.56

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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.