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Finding the Fourth Proportional to 270,730.20, 405,749.70 and 208,090.20

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Solution

The fourth proportional to 270,730.20, 405,749.70 and 208,090.20 is: 311,869.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,730.20 : 405,749.70 = 208,090.20 : x
  2. Step 2: Convert to fraction form
    270,730.20/405,749.70 = 208,090.20/x
  3. Step 3: Cross multiply
    270,730.20x = 405,749.70 × 208,090.20
  4. Step 4: Simplify right side
    270,730.20x = 84,432,536,222.94
  5. Step 5: Solve for x
    x = 84,432,536,222.94/270,730.20
  6. Step 6: Final answer
    x = 311,869.66

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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.