Home / 1,239.66-1,709.79-1,164.06

Finding the Fourth Proportional to 1,239.66, 1,709.79 and 1,164.06

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Solution

The fourth proportional to 1,239.66, 1,709.79 and 1,164.06 is: 1,605.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.66 : 1,709.79 = 1,164.06 : x
  2. Step 2: Convert to fraction form
    1,239.66/1,709.79 = 1,164.06/x
  3. Step 3: Cross multiply
    1,239.66x = 1,709.79 × 1,164.06
  4. Step 4: Simplify right side
    1,239.66x = 1,990,298.15
  5. Step 5: Solve for x
    x = 1,990,298.15/1,239.66
  6. Step 6: Final answer
    x = 1,605.52

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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.