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Finding the Fourth Proportional to 300,619.80, 450,929.70 and 90,230.40

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Solution

The fourth proportional to 300,619.80, 450,929.70 and 90,230.40 is: 135,345.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,619.80 : 450,929.70 = 90,230.40 : x
  2. Step 2: Convert to fraction form
    300,619.80/450,929.70 = 90,230.40/x
  3. Step 3: Cross multiply
    300,619.80x = 450,929.70 × 90,230.40
  4. Step 4: Simplify right side
    300,619.80x = 40,687,567,202.88
  5. Step 5: Solve for x
    x = 40,687,567,202.88/300,619.80
  6. Step 6: Final answer
    x = 135,345.60

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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.