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Finding the Fourth Proportional to 624,454.89, 861,768.65 and 382,690.78

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Solution

The fourth proportional to 624,454.89, 861,768.65 and 382,690.78 is: 528,126.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,454.89 : 861,768.65 = 382,690.78 : x
  2. Step 2: Convert to fraction form
    624,454.89/861,768.65 = 382,690.78/x
  3. Step 3: Cross multiply
    624,454.89x = 861,768.65 × 382,690.78
  4. Step 4: Simplify right side
    624,454.89x = 329,790,915,650.35
  5. Step 5: Solve for x
    x = 329,790,915,650.35/624,454.89
  6. Step 6: Final answer
    x = 528,126.08

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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.