Home / 1,812.39-2,716.64-1,187.45

Finding the Fourth Proportional to 1,812.39, 2,716.64 and 1,187.45

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Solution

The fourth proportional to 1,812.39, 2,716.64 and 1,187.45 is: 1,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.39 : 2,716.64 = 1,187.45 : x
  2. Step 2: Convert to fraction form
    1,812.39/2,716.64 = 1,187.45/x
  3. Step 3: Cross multiply
    1,812.39x = 2,716.64 × 1,187.45
  4. Step 4: Simplify right side
    1,812.39x = 3,225,854.65
  5. Step 5: Solve for x
    x = 3,225,854.65/1,812.39
  6. Step 6: Final answer
    x = 1,779.89

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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.