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Finding the Fourth Proportional to 2,368.59, 3,553.29 and 981.15

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Solution

The fourth proportional to 2,368.59, 3,553.29 and 981.15 is: 1,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,368.59 : 3,553.29 = 981.15 : x
  2. Step 2: Convert to fraction form
    2,368.59/3,553.29 = 981.15/x
  3. Step 3: Cross multiply
    2,368.59x = 3,553.29 × 981.15
  4. Step 4: Simplify right side
    2,368.59x = 3,486,310.48
  5. Step 5: Solve for x
    x = 3,486,310.48/2,368.59
  6. Step 6: Final answer
    x = 1,471.89

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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.