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Finding the Fourth Proportional to 640,641.30, 884,060.34 and 382,561.62

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Solution

The fourth proportional to 640,641.30, 884,060.34 and 382,561.62 is: 527,920.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,641.30 : 884,060.34 = 382,561.62 : x
  2. Step 2: Convert to fraction form
    640,641.30/884,060.34 = 382,561.62/x
  3. Step 3: Cross multiply
    640,641.30x = 884,060.34 × 382,561.62
  4. Step 4: Simplify right side
    640,641.30x = 338,207,555,848.15
  5. Step 5: Solve for x
    x = 338,207,555,848.15/640,641.30
  6. Step 6: Final answer
    x = 527,920.31

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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.