Home / 1,909.10-2,857.55-1,245.68

Finding the Fourth Proportional to 1,909.10, 2,857.55 and 1,245.68

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Solution

The fourth proportional to 1,909.10, 2,857.55 and 1,245.68 is: 1,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.10 : 2,857.55 = 1,245.68 : x
  2. Step 2: Convert to fraction form
    1,909.10/2,857.55 = 1,245.68/x
  3. Step 3: Cross multiply
    1,909.10x = 2,857.55 × 1,245.68
  4. Step 4: Simplify right side
    1,909.10x = 3,559,572.37
  5. Step 5: Solve for x
    x = 3,559,572.37/1,909.10
  6. Step 6: Final answer
    x = 1,864.53

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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.