Home / 639,105.90-882,285.74-397,466.31

Finding the Fourth Proportional to 639,105.90, 882,285.74 and 397,466.31

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Solution

The fourth proportional to 639,105.90, 882,285.74 and 397,466.31 is: 548,702.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,105.90 : 882,285.74 = 397,466.31 : x
  2. Step 2: Convert to fraction form
    639,105.90/882,285.74 = 397,466.31/x
  3. Step 3: Cross multiply
    639,105.90x = 882,285.74 × 397,466.31
  4. Step 4: Simplify right side
    639,105.90x = 350,678,855,456.09
  5. Step 5: Solve for x
    x = 350,678,855,456.09/639,105.90
  6. Step 6: Final answer
    x = 548,702.27

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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.