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Finding the Fourth Proportional to 285,445.30, 393,897.58 and 156,357.97

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Solution

The fourth proportional to 285,445.30, 393,897.58 and 156,357.97 is: 215,764.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,445.30 : 393,897.58 = 156,357.97 : x
  2. Step 2: Convert to fraction form
    285,445.30/393,897.58 = 156,357.97/x
  3. Step 3: Cross multiply
    285,445.30x = 393,897.58 × 156,357.97
  4. Step 4: Simplify right side
    285,445.30x = 61,589,023,636.33
  5. Step 5: Solve for x
    x = 61,589,023,636.33/285,445.30
  6. Step 6: Final answer
    x = 215,764.72

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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.