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Finding the Fourth Proportional to 611,813.56, 917,851.68 and 256,622.86

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Solution

The fourth proportional to 611,813.56, 917,851.68 and 256,622.86 is: 384,989.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,813.56 : 917,851.68 = 256,622.86 : x
  2. Step 2: Convert to fraction form
    611,813.56/917,851.68 = 256,622.86/x
  3. Step 3: Cross multiply
    611,813.56x = 917,851.68 × 256,622.86
  4. Step 4: Simplify right side
    611,813.56x = 235,541,723,177.41
  5. Step 5: Solve for x
    x = 235,541,723,177.41/611,813.56
  6. Step 6: Final answer
    x = 384,989.38

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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.