Home / 1,389.20-2,083.59-523.53

Finding the Fourth Proportional to 1,389.20, 2,083.59 and 523.53

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Solution

The fourth proportional to 1,389.20, 2,083.59 and 523.53 is: 785.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.20 : 2,083.59 = 523.53 : x
  2. Step 2: Convert to fraction form
    1,389.20/2,083.59 = 523.53/x
  3. Step 3: Cross multiply
    1,389.20x = 2,083.59 × 523.53
  4. Step 4: Simplify right side
    1,389.20x = 1,090,821.87
  5. Step 5: Solve for x
    x = 1,090,821.87/1,389.20
  6. Step 6: Final answer
    x = 785.22

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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.