Home / 1,320.72-1,979.87-589.91

Finding the Fourth Proportional to 1,320.72, 1,979.87 and 589.91

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Solution

The fourth proportional to 1,320.72, 1,979.87 and 589.91 is: 884.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.72 : 1,979.87 = 589.91 : x
  2. Step 2: Convert to fraction form
    1,320.72/1,979.87 = 589.91/x
  3. Step 3: Cross multiply
    1,320.72x = 1,979.87 × 589.91
  4. Step 4: Simplify right side
    1,320.72x = 1,167,932.26
  5. Step 5: Solve for x
    x = 1,167,932.26/1,320.72
  6. Step 6: Final answer
    x = 884.31

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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.