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Finding the Fourth Proportional to 3,612.89, 4,985.76 and 1,956.89

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Solution

The fourth proportional to 3,612.89, 4,985.76 and 1,956.89 is: 2,700.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.89 : 4,985.76 = 1,956.89 : x
  2. Step 2: Convert to fraction form
    3,612.89/4,985.76 = 1,956.89/x
  3. Step 3: Cross multiply
    3,612.89x = 4,985.76 × 1,956.89
  4. Step 4: Simplify right side
    3,612.89x = 9,756,583.89
  5. Step 5: Solve for x
    x = 9,756,583.89/3,612.89
  6. Step 6: Final answer
    x = 2,700.49

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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.