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Finding the Fourth Proportional to 324,009.40, 485,841.30 and 136,809.40

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Solution

The fourth proportional to 324,009.40, 485,841.30 and 136,809.40 is: 205,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,009.40 : 485,841.30 = 136,809.40 : x
  2. Step 2: Convert to fraction form
    324,009.40/485,841.30 = 136,809.40/x
  3. Step 3: Cross multiply
    324,009.40x = 485,841.30 × 136,809.40
  4. Step 4: Simplify right side
    324,009.40x = 66,467,656,748.22
  5. Step 5: Solve for x
    x = 66,467,656,748.22/324,009.40
  6. Step 6: Final answer
    x = 205,141.14

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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.