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Finding the Fourth Proportional to 611,576.60, 917,364.90 and 256,845.20

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Solution

The fourth proportional to 611,576.60, 917,364.90 and 256,845.20 is: 385,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,576.60 : 917,364.90 = 256,845.20 : x
  2. Step 2: Convert to fraction form
    611,576.60/917,364.90 = 256,845.20/x
  3. Step 3: Cross multiply
    611,576.60x = 917,364.90 × 256,845.20
  4. Step 4: Simplify right side
    611,576.60x = 235,620,771,213.48
  5. Step 5: Solve for x
    x = 235,620,771,213.48/611,576.60
  6. Step 6: Final answer
    x = 385,267.80

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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.