Home / 1,212.12-1,818.78-904.59

Finding the Fourth Proportional to 1,212.12, 1,818.78 and 904.59

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Solution

The fourth proportional to 1,212.12, 1,818.78 and 904.59 is: 1,357.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.12 : 1,818.78 = 904.59 : x
  2. Step 2: Convert to fraction form
    1,212.12/1,818.78 = 904.59/x
  3. Step 3: Cross multiply
    1,212.12x = 1,818.78 × 904.59
  4. Step 4: Simplify right side
    1,212.12x = 1,645,250.20
  5. Step 5: Solve for x
    x = 1,645,250.20/1,212.12
  6. Step 6: Final answer
    x = 1,357.33

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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.