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Finding the Fourth Proportional to 636,434.85, 878,061.54 and 394,630.41

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Solution

The fourth proportional to 636,434.85, 878,061.54 and 394,630.41 is: 544,454.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,434.85 : 878,061.54 = 394,630.41 : x
  2. Step 2: Convert to fraction form
    636,434.85/878,061.54 = 394,630.41/x
  3. Step 3: Cross multiply
    636,434.85x = 878,061.54 × 394,630.41
  4. Step 4: Simplify right side
    636,434.85x = 346,509,785,535.43
  5. Step 5: Solve for x
    x = 346,509,785,535.43/636,434.85
  6. Step 6: Final answer
    x = 544,454.45

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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.