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Finding the Fourth Proportional to 283,440.92, 391,148.46 and 156,116.51

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Solution

The fourth proportional to 283,440.92, 391,148.46 and 156,116.51 is: 215,440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,440.92 : 391,148.46 = 156,116.51 : x
  2. Step 2: Convert to fraction form
    283,440.92/391,148.46 = 156,116.51/x
  3. Step 3: Cross multiply
    283,440.92x = 391,148.46 × 156,116.51
  4. Step 4: Simplify right side
    283,440.92x = 61,064,733,519.73
  5. Step 5: Solve for x
    x = 61,064,733,519.73/283,440.92
  6. Step 6: Final answer
    x = 215,440.78

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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.