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Finding the Fourth Proportional to 285,445.17, 393,897.41 and 156,357.84

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Solution

The fourth proportional to 285,445.17, 393,897.41 and 156,357.84 is: 215,764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,445.17 : 393,897.41 = 156,357.84 : x
  2. Step 2: Convert to fraction form
    285,445.17/393,897.41 = 156,357.84/x
  3. Step 3: Cross multiply
    285,445.17x = 393,897.41 × 156,357.84
  4. Step 4: Simplify right side
    285,445.17x = 61,588,947,427.41
  5. Step 5: Solve for x
    x = 61,588,947,427.41/285,445.17
  6. Step 6: Final answer
    x = 215,764.55

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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.