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Finding the Fourth Proportional to 287,586.30, 431,379.45 and 181,298.10

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Solution

The fourth proportional to 287,586.30, 431,379.45 and 181,298.10 is: 271,947.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,586.30 : 431,379.45 = 181,298.10 : x
  2. Step 2: Convert to fraction form
    287,586.30/431,379.45 = 181,298.10/x
  3. Step 3: Cross multiply
    287,586.30x = 431,379.45 × 181,298.10
  4. Step 4: Simplify right side
    287,586.30x = 78,208,274,664.05
  5. Step 5: Solve for x
    x = 78,208,274,664.05/287,586.30
  6. Step 6: Final answer
    x = 271,947.15

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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.