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Finding the Fourth Proportional to 611,693.92, 917,495.52 and 256,693.60

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Solution

The fourth proportional to 611,693.92, 917,495.52 and 256,693.60 is: 385,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,693.92 : 917,495.52 = 256,693.60 : x
  2. Step 2: Convert to fraction form
    611,693.92/917,495.52 = 256,693.60/x
  3. Step 3: Cross multiply
    611,693.92x = 917,495.52 × 256,693.60
  4. Step 4: Simplify right side
    611,693.92x = 235,515,228,012.67
  5. Step 5: Solve for x
    x = 235,515,228,012.67/611,693.92
  6. Step 6: Final answer
    x = 385,021.36

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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.