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Finding the Fourth Proportional to 611,139.70, 916,818.90 and 256,189.60

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Solution

The fourth proportional to 611,139.70, 916,818.90 and 256,189.60 is: 384,330.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,139.70 : 916,818.90 = 256,189.60 : x
  2. Step 2: Convert to fraction form
    611,139.70/916,818.90 = 256,189.60/x
  3. Step 3: Cross multiply
    611,139.70x = 916,818.90 × 256,189.60
  4. Step 4: Simplify right side
    611,139.70x = 234,879,467,263.44
  5. Step 5: Solve for x
    x = 234,879,467,263.44/611,139.70
  6. Step 6: Final answer
    x = 384,330.24

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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.