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Finding the Fourth Proportional to 641,558.76, 885,200.64 and 438,033.51

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Solution

The fourth proportional to 641,558.76, 885,200.64 and 438,033.51 is: 604,383.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,558.76 : 885,200.64 = 438,033.51 : x
  2. Step 2: Convert to fraction form
    641,558.76/885,200.64 = 438,033.51/x
  3. Step 3: Cross multiply
    641,558.76x = 885,200.64 × 438,033.51
  4. Step 4: Simplify right side
    641,558.76x = 387,747,543,393.45
  5. Step 5: Solve for x
    x = 387,747,543,393.45/641,558.76
  6. Step 6: Final answer
    x = 604,383.52

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Double scale
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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.