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Finding the Fourth Proportional to 640,416.48, 883,740.05 and 353,918.11

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Solution

The fourth proportional to 640,416.48, 883,740.05 and 353,918.11 is: 488,387.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,416.48 : 883,740.05 = 353,918.11 : x
  2. Step 2: Convert to fraction form
    640,416.48/883,740.05 = 353,918.11/x
  3. Step 3: Cross multiply
    640,416.48x = 883,740.05 × 353,918.11
  4. Step 4: Simplify right side
    640,416.48x = 312,771,606,237.18
  5. Step 5: Solve for x
    x = 312,771,606,237.18/640,416.48
  6. Step 6: Final answer
    x = 488,387.82

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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.