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Finding the Fourth Proportional to 5,387.99, 7,435.79 and 2,998.49

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Solution

The fourth proportional to 5,387.99, 7,435.79 and 2,998.49 is: 4,138.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.99 : 7,435.79 = 2,998.49 : x
  2. Step 2: Convert to fraction form
    5,387.99/7,435.79 = 2,998.49/x
  3. Step 3: Cross multiply
    5,387.99x = 7,435.79 × 2,998.49
  4. Step 4: Simplify right side
    5,387.99x = 22,296,168.04
  5. Step 5: Solve for x
    x = 22,296,168.04/5,387.99
  6. Step 6: Final answer
    x = 4,138.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.