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Finding the Fourth Proportional to 2,315.13, 3,471.68 and 853.29

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Solution

The fourth proportional to 2,315.13, 3,471.68 and 853.29 is: 1,279.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.13 : 3,471.68 = 853.29 : x
  2. Step 2: Convert to fraction form
    2,315.13/3,471.68 = 853.29/x
  3. Step 3: Cross multiply
    2,315.13x = 3,471.68 × 853.29
  4. Step 4: Simplify right side
    2,315.13x = 2,962,345.56
  5. Step 5: Solve for x
    x = 2,962,345.56/2,315.13
  6. Step 6: Final answer
    x = 1,279.56

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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.