Home / 1,529.40-2,109.78-1,308.36

Finding the Fourth Proportional to 1,529.40, 2,109.78 and 1,308.36

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Solution

The fourth proportional to 1,529.40, 2,109.78 and 1,308.36 is: 1,804.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.40 : 2,109.78 = 1,308.36 : x
  2. Step 2: Convert to fraction form
    1,529.40/2,109.78 = 1,308.36/x
  3. Step 3: Cross multiply
    1,529.40x = 2,109.78 × 1,308.36
  4. Step 4: Simplify right side
    1,529.40x = 2,760,351.76
  5. Step 5: Solve for x
    x = 2,760,351.76/1,529.40
  6. Step 6: Final answer
    x = 1,804.86

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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.