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Finding the Fourth Proportional to 641,936.92, 885,872.90 and 355,457.01

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Solution

The fourth proportional to 641,936.92, 885,872.90 and 355,457.01 is: 490,530.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,936.92 : 885,872.90 = 355,457.01 : x
  2. Step 2: Convert to fraction form
    641,936.92/885,872.90 = 355,457.01/x
  3. Step 3: Cross multiply
    641,936.92x = 885,872.90 × 355,457.01
  4. Step 4: Simplify right side
    641,936.92x = 314,889,731,501.66
  5. Step 5: Solve for x
    x = 314,889,731,501.66/641,936.92
  6. Step 6: Final answer
    x = 490,530.64

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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.