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Finding the Fourth Proportional to 639,586.28, 882,671.64 and 424,356.32

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Solution

The fourth proportional to 639,586.28, 882,671.64 and 424,356.32 is: 585,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,586.28 : 882,671.64 = 424,356.32 : x
  2. Step 2: Convert to fraction form
    639,586.28/882,671.64 = 424,356.32/x
  3. Step 3: Cross multiply
    639,586.28x = 882,671.64 × 424,356.32
  4. Step 4: Simplify right side
    639,586.28x = 374,567,288,918.77
  5. Step 5: Solve for x
    x = 374,567,288,918.77/639,586.28
  6. Step 6: Final answer
    x = 585,639.97

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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.