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Finding the Fourth Proportional to 639,450.36, 882,441.54 and 352,970.52

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Solution

The fourth proportional to 639,450.36, 882,441.54 and 352,970.52 is: 487,099.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,450.36 : 882,441.54 = 352,970.52 : x
  2. Step 2: Convert to fraction form
    639,450.36/882,441.54 = 352,970.52/x
  3. Step 3: Cross multiply
    639,450.36x = 882,441.54 × 352,970.52
  4. Step 4: Simplify right side
    639,450.36x = 311,475,849,243.40
  5. Step 5: Solve for x
    x = 311,475,849,243.40/639,450.36
  6. Step 6: Final answer
    x = 487,099.34

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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.