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Finding the Fourth Proportional to 1,389.24, 2,083.02 and 608.82

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Solution

The fourth proportional to 1,389.24, 2,083.02 and 608.82 is: 912.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.24 : 2,083.02 = 608.82 : x
  2. Step 2: Convert to fraction form
    1,389.24/2,083.02 = 608.82/x
  3. Step 3: Cross multiply
    1,389.24x = 2,083.02 × 608.82
  4. Step 4: Simplify right side
    1,389.24x = 1,268,184.24
  5. Step 5: Solve for x
    x = 1,268,184.24/1,389.24
  6. Step 6: Final answer
    x = 912.86

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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.