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Finding the Fourth Proportional to 1,299.67, 1,949.49 and 569.31

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Solution

The fourth proportional to 1,299.67, 1,949.49 and 569.31 is: 853.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.67 : 1,949.49 = 569.31 : x
  2. Step 2: Convert to fraction form
    1,299.67/1,949.49 = 569.31/x
  3. Step 3: Cross multiply
    1,299.67x = 1,949.49 × 569.31
  4. Step 4: Simplify right side
    1,299.67x = 1,109,864.15
  5. Step 5: Solve for x
    x = 1,109,864.15/1,299.67
  6. Step 6: Final answer
    x = 853.96

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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.