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Finding the Fourth Proportional to 819,714.30, 1,131,203.49 and 457,138.54

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Solution

The fourth proportional to 819,714.30, 1,131,203.49 and 457,138.54 is: 630,849.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,714.30 : 1,131,203.49 = 457,138.54 : x
  2. Step 2: Convert to fraction form
    819,714.30/1,131,203.49 = 457,138.54/x
  3. Step 3: Cross multiply
    819,714.30x = 1,131,203.49 × 457,138.54
  4. Step 4: Simplify right side
    819,714.30x = 517,116,711,861.51
  5. Step 5: Solve for x
    x = 517,116,711,861.51/819,714.30
  6. Step 6: Final answer
    x = 630,849.93

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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.