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Finding the Fourth Proportional to 611,505.70, 917,367.90 and 256,555.60

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Solution

The fourth proportional to 611,505.70, 917,367.90 and 256,555.60 is: 384,879.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,505.70 : 917,367.90 = 256,555.60 : x
  2. Step 2: Convert to fraction form
    611,505.70/917,367.90 = 256,555.60/x
  3. Step 3: Cross multiply
    611,505.70x = 917,367.90 × 256,555.60
  4. Step 4: Simplify right side
    611,505.70x = 235,355,872,005.24
  5. Step 5: Solve for x
    x = 235,355,872,005.24/611,505.70
  6. Step 6: Final answer
    x = 384,879.28

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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.