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Finding the Fourth Proportional to 399,714.85, 551,553.35 and 256,668.65

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Solution

The fourth proportional to 399,714.85, 551,553.35 and 256,668.65 is: 354,168.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,714.85 : 551,553.35 = 256,668.65 : x
  2. Step 2: Convert to fraction form
    399,714.85/551,553.35 = 256,668.65/x
  3. Step 3: Cross multiply
    399,714.85x = 551,553.35 × 256,668.65
  4. Step 4: Simplify right side
    399,714.85x = 141,566,453,218.45
  5. Step 5: Solve for x
    x = 141,566,453,218.45/399,714.85
  6. Step 6: Final answer
    x = 354,168.61

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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.