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Finding the Fourth Proportional to 270,695.20, 405,697.20 and 208,055.20

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Solution

The fourth proportional to 270,695.20, 405,697.20 and 208,055.20 is: 311,817.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,695.20 : 405,697.20 = 208,055.20 : x
  2. Step 2: Convert to fraction form
    270,695.20/405,697.20 = 208,055.20/x
  3. Step 3: Cross multiply
    270,695.20x = 405,697.20 × 208,055.20
  4. Step 4: Simplify right side
    270,695.20x = 84,407,412,085.44
  5. Step 5: Solve for x
    x = 84,407,412,085.44/270,695.20
  6. Step 6: Final answer
    x = 311,817.17

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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.