Home / 1,336.48-2,005.28-687.36

Finding the Fourth Proportional to 1,336.48, 2,005.28 and 687.36

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Solution

The fourth proportional to 1,336.48, 2,005.28 and 687.36 is: 1,031.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.48 : 2,005.28 = 687.36 : x
  2. Step 2: Convert to fraction form
    1,336.48/2,005.28 = 687.36/x
  3. Step 3: Cross multiply
    1,336.48x = 2,005.28 × 687.36
  4. Step 4: Simplify right side
    1,336.48x = 1,378,349.26
  5. Step 5: Solve for x
    x = 1,378,349.26/1,336.48
  6. Step 6: Final answer
    x = 1,031.33

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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.