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Finding the Fourth Proportional to 640,218.47, 883,425.69 and 382,047.57

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Solution

The fourth proportional to 640,218.47, 883,425.69 and 382,047.57 is: 527,180.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,218.47 : 883,425.69 = 382,047.57 : x
  2. Step 2: Convert to fraction form
    640,218.47/883,425.69 = 382,047.57/x
  3. Step 3: Cross multiply
    640,218.47x = 883,425.69 × 382,047.57
  4. Step 4: Simplify right side
    640,218.47x = 337,510,638,140.07
  5. Step 5: Solve for x
    x = 337,510,638,140.07/640,218.47
  6. Step 6: Final answer
    x = 527,180.42

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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.