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Finding the Fourth Proportional to 612,096.90, 917,817.30 and 256,709.40

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Solution

The fourth proportional to 612,096.90, 917,817.30 and 256,709.40 is: 384,926.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,096.90 : 917,817.30 = 256,709.40 : x
  2. Step 2: Convert to fraction form
    612,096.90/917,817.30 = 256,709.40/x
  3. Step 3: Cross multiply
    612,096.90x = 917,817.30 × 256,709.40
  4. Step 4: Simplify right side
    612,096.90x = 235,612,328,392.62
  5. Step 5: Solve for x
    x = 235,612,328,392.62/612,096.90
  6. Step 6: Final answer
    x = 384,926.52

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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.