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Finding the Fourth Proportional to 624,453.78, 861,767.12 and 382,689.68

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Solution

The fourth proportional to 624,453.78, 861,767.12 and 382,689.68 is: 528,124.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,453.78 : 861,767.12 = 382,689.68 : x
  2. Step 2: Convert to fraction form
    624,453.78/861,767.12 = 382,689.68/x
  3. Step 3: Cross multiply
    624,453.78x = 861,767.12 × 382,689.68
  4. Step 4: Simplify right side
    624,453.78x = 329,789,383,387.32
  5. Step 5: Solve for x
    x = 329,789,383,387.32/624,453.78
  6. Step 6: Final answer
    x = 528,124.57

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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.