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Finding the Fourth Proportional to 270,609.20, 405,913.80 and 83,620.40

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Solution

The fourth proportional to 270,609.20, 405,913.80 and 83,620.40 is: 125,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,609.20 : 405,913.80 = 83,620.40 : x
  2. Step 2: Convert to fraction form
    270,609.20/405,913.80 = 83,620.40/x
  3. Step 3: Cross multiply
    270,609.20x = 405,913.80 × 83,620.40
  4. Step 4: Simplify right side
    270,609.20x = 33,942,674,321.52
  5. Step 5: Solve for x
    x = 33,942,674,321.52/270,609.20
  6. Step 6: Final answer
    x = 125,430.60

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1.5x scale

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.