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Finding the Fourth Proportional to 1,525.96, 2,105.85 and 853.75

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Solution

The fourth proportional to 1,525.96, 2,105.85 and 853.75 is: 1,178.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,525.96 : 2,105.85 = 853.75 : x
  2. Step 2: Convert to fraction form
    1,525.96/2,105.85 = 853.75/x
  3. Step 3: Cross multiply
    1,525.96x = 2,105.85 × 853.75
  4. Step 4: Simplify right side
    1,525.96x = 1,797,869.44
  5. Step 5: Solve for x
    x = 1,797,869.44/1,525.96
  6. Step 6: Final answer
    x = 1,178.19

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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.