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Finding the Fourth Proportional to 270,346.40, 405,929.20 and 208,087.20

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Solution

The fourth proportional to 270,346.40, 405,929.20 and 208,087.20 is: 312,446.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,346.40 : 405,929.20 = 208,087.20 : x
  2. Step 2: Convert to fraction form
    270,346.40/405,929.20 = 208,087.20/x
  3. Step 3: Cross multiply
    270,346.40x = 405,929.20 × 208,087.20
  4. Step 4: Simplify right side
    270,346.40x = 84,468,670,626.24
  5. Step 5: Solve for x
    x = 84,468,670,626.24/270,346.40
  6. Step 6: Final answer
    x = 312,446.07

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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.