Home / 1,359.30-2,036.33-811.92

Finding the Fourth Proportional to 1,359.30, 2,036.33 and 811.92

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Solution

The fourth proportional to 1,359.30, 2,036.33 and 811.92 is: 1,216.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.30 : 2,036.33 = 811.92 : x
  2. Step 2: Convert to fraction form
    1,359.30/2,036.33 = 811.92/x
  3. Step 3: Cross multiply
    1,359.30x = 2,036.33 × 811.92
  4. Step 4: Simplify right side
    1,359.30x = 1,653,337.05
  5. Step 5: Solve for x
    x = 1,653,337.05/1,359.30
  6. Step 6: Final answer
    x = 1,216.32

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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.