Home / 1,086.32-1,629.48-317.36

Finding the Fourth Proportional to 1,086.32, 1,629.48 and 317.36

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Solution

The fourth proportional to 1,086.32, 1,629.48 and 317.36 is: 476.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.32 : 1,629.48 = 317.36 : x
  2. Step 2: Convert to fraction form
    1,086.32/1,629.48 = 317.36/x
  3. Step 3: Cross multiply
    1,086.32x = 1,629.48 × 317.36
  4. Step 4: Simplify right side
    1,086.32x = 517,131.77
  5. Step 5: Solve for x
    x = 517,131.77/1,086.32
  6. Step 6: Final answer
    x = 476.04

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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.