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Finding the Fourth Proportional to 639,641.34, 959,465.52 and 265,664.34

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Solution

The fourth proportional to 639,641.34, 959,465.52 and 265,664.34 is: 398,497.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,641.34 : 959,465.52 = 265,664.34 : x
  2. Step 2: Convert to fraction form
    639,641.34/959,465.52 = 265,664.34/x
  3. Step 3: Cross multiply
    639,641.34x = 959,465.52 × 265,664.34
  4. Step 4: Simplify right side
    639,641.34x = 254,895,774,123.56
  5. Step 5: Solve for x
    x = 254,895,774,123.56/639,641.34
  6. Step 6: Final answer
    x = 398,497.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.