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Finding the Fourth Proportional to 399,800.88, 551,672.10 and 256,754.70

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Solution

The fourth proportional to 399,800.88, 551,672.10 and 256,754.70 is: 354,287.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,800.88 : 551,672.10 = 256,754.70 : x
  2. Step 2: Convert to fraction form
    399,800.88/551,672.10 = 256,754.70/x
  3. Step 3: Cross multiply
    399,800.88x = 551,672.10 × 256,754.70
  4. Step 4: Simplify right side
    399,800.88x = 141,644,404,533.87
  5. Step 5: Solve for x
    x = 141,644,404,533.87/399,800.88
  6. Step 6: Final answer
    x = 354,287.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.