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Finding the Fourth Proportional to 283,644.32, 391,411.44 and 156,320.82

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Solution

The fourth proportional to 283,644.32, 391,411.44 and 156,320.82 is: 215,712.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,644.32 : 391,411.44 = 156,320.82 : x
  2. Step 2: Convert to fraction form
    283,644.32/391,411.44 = 156,320.82/x
  3. Step 3: Cross multiply
    283,644.32x = 391,411.44 × 156,320.82
  4. Step 4: Simplify right side
    283,644.32x = 61,185,757,258.18
  5. Step 5: Solve for x
    x = 61,185,757,258.18/283,644.32
  6. Step 6: Final answer
    x = 215,712.97

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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.