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Finding the Fourth Proportional to 641,457.68, 885,213.32 and 354,997.52

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Solution

The fourth proportional to 641,457.68, 885,213.32 and 354,997.52 is: 489,897.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,457.68 : 885,213.32 = 354,997.52 : x
  2. Step 2: Convert to fraction form
    641,457.68/885,213.32 = 354,997.52/x
  3. Step 3: Cross multiply
    641,457.68x = 885,213.32 × 354,997.52
  4. Step 4: Simplify right side
    641,457.68x = 314,248,533,270.97
  5. Step 5: Solve for x
    x = 314,248,533,270.97/641,457.68
  6. Step 6: Final answer
    x = 489,897.53

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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.