Home / 1,215.07-1,677.72-1,212.64

Finding the Fourth Proportional to 1,215.07, 1,677.72 and 1,212.64

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Solution

The fourth proportional to 1,215.07, 1,677.72 and 1,212.64 is: 1,674.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.07 : 1,677.72 = 1,212.64 : x
  2. Step 2: Convert to fraction form
    1,215.07/1,677.72 = 1,212.64/x
  3. Step 3: Cross multiply
    1,215.07x = 1,677.72 × 1,212.64
  4. Step 4: Simplify right side
    1,215.07x = 2,034,470.38
  5. Step 5: Solve for x
    x = 2,034,470.38/1,215.07
  6. Step 6: Final answer
    x = 1,674.36

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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.