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Finding the Fourth Proportional to 270,009.80, 405,014.70 and 220,146.20

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Solution

The fourth proportional to 270,009.80, 405,014.70 and 220,146.20 is: 330,219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,009.80 : 405,014.70 = 220,146.20 : x
  2. Step 2: Convert to fraction form
    270,009.80/405,014.70 = 220,146.20/x
  3. Step 3: Cross multiply
    270,009.80x = 405,014.70 × 220,146.20
  4. Step 4: Simplify right side
    270,009.80x = 89,162,447,149.14
  5. Step 5: Solve for x
    x = 89,162,447,149.14/270,009.80
  6. Step 6: Final answer
    x = 330,219.30

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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.