Home / 1,320.09-1,979.53-382.82

Finding the Fourth Proportional to 1,320.09, 1,979.53 and 382.82

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Solution

The fourth proportional to 1,320.09, 1,979.53 and 382.82 is: 574.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.09 : 1,979.53 = 382.82 : x
  2. Step 2: Convert to fraction form
    1,320.09/1,979.53 = 382.82/x
  3. Step 3: Cross multiply
    1,320.09x = 1,979.53 × 382.82
  4. Step 4: Simplify right side
    1,320.09x = 757,803.67
  5. Step 5: Solve for x
    x = 757,803.67/1,320.09
  6. Step 6: Final answer
    x = 574.05

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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.