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Finding the Fourth Proportional to 300,988.48, 451,309.92 and 90,564.16

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Solution

The fourth proportional to 300,988.48, 451,309.92 and 90,564.16 is: 135,794.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,988.48 : 451,309.92 = 90,564.16 : x
  2. Step 2: Convert to fraction form
    300,988.48/451,309.92 = 90,564.16/x
  3. Step 3: Cross multiply
    300,988.48x = 451,309.92 × 90,564.16
  4. Step 4: Simplify right side
    300,988.48x = 40,872,503,804.47
  5. Step 5: Solve for x
    x = 40,872,503,804.47/300,988.48
  6. Step 6: Final answer
    x = 135,794.25

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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.