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Finding the Fourth Proportional to 391,309.44, 540,236.16 and 283,776

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Solution

The fourth proportional to 391,309.44, 540,236.16 and 283,776 is: 391,777.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,309.44 : 540,236.16 = 283,776 : x
  2. Step 2: Convert to fraction form
    391,309.44/540,236.16 = 283,776/x
  3. Step 3: Cross multiply
    391,309.44x = 540,236.16 × 283,776
  4. Step 4: Simplify right side
    391,309.44x = 153,306,056,540.16
  5. Step 5: Solve for x
    x = 153,306,056,540.16/391,309.44
  6. Step 6: Final answer
    x = 391,777.05

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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.