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Finding the Fourth Proportional to 640,661.43, 883,901.48 and 411,347.19

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Solution

The fourth proportional to 640,661.43, 883,901.48 and 411,347.19 is: 567,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,661.43 : 883,901.48 = 411,347.19 : x
  2. Step 2: Convert to fraction form
    640,661.43/883,901.48 = 411,347.19/x
  3. Step 3: Cross multiply
    640,661.43x = 883,901.48 × 411,347.19
  4. Step 4: Simplify right side
    640,661.43x = 363,590,387,978.11
  5. Step 5: Solve for x
    x = 363,590,387,978.11/640,661.43
  6. Step 6: Final answer
    x = 567,523.45

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Half scale
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Double scale
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Similar ratio
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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.