Home / 1,320.81-1,979.66-540.33

Finding the Fourth Proportional to 1,320.81, 1,979.66 and 540.33

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Solution

The fourth proportional to 1,320.81, 1,979.66 and 540.33 is: 809.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.81 : 1,979.66 = 540.33 : x
  2. Step 2: Convert to fraction form
    1,320.81/1,979.66 = 540.33/x
  3. Step 3: Cross multiply
    1,320.81x = 1,979.66 × 540.33
  4. Step 4: Simplify right side
    1,320.81x = 1,069,666.99
  5. Step 5: Solve for x
    x = 1,069,666.99/1,320.81
  6. Step 6: Final answer
    x = 809.86

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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.