Home / 1,320.53-1,979.19-486.92

Finding the Fourth Proportional to 1,320.53, 1,979.19 and 486.92

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Solution

The fourth proportional to 1,320.53, 1,979.19 and 486.92 is: 729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.53 : 1,979.19 = 486.92 : x
  2. Step 2: Convert to fraction form
    1,320.53/1,979.19 = 486.92/x
  3. Step 3: Cross multiply
    1,320.53x = 1,979.19 × 486.92
  4. Step 4: Simplify right side
    1,320.53x = 963,697.30
  5. Step 5: Solve for x
    x = 963,697.30/1,320.53
  6. Step 6: Final answer
    x = 729.78

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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.