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Finding the Fourth Proportional to 619,532.88, 855,255.78 and 415,509.36

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Solution

The fourth proportional to 619,532.88, 855,255.78 and 415,509.36 is: 573,604.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,532.88 : 855,255.78 = 415,509.36 : x
  2. Step 2: Convert to fraction form
    619,532.88/855,255.78 = 415,509.36/x
  3. Step 3: Cross multiply
    619,532.88x = 855,255.78 × 415,509.36
  4. Step 4: Simplify right side
    619,532.88x = 355,366,781,784.10
  5. Step 5: Solve for x
    x = 355,366,781,784.10/619,532.88
  6. Step 6: Final answer
    x = 573,604.39

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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.