Home / 415,857.20-623,785.80-205,905.20

Finding the Fourth Proportional to 415,857.20, 623,785.80 and 205,905.20

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Solution

The fourth proportional to 415,857.20, 623,785.80 and 205,905.20 is: 308,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,857.20 : 623,785.80 = 205,905.20 : x
  2. Step 2: Convert to fraction form
    415,857.20/623,785.80 = 205,905.20/x
  3. Step 3: Cross multiply
    415,857.20x = 623,785.80 × 205,905.20
  4. Step 4: Simplify right side
    415,857.20x = 128,440,739,906.16
  5. Step 5: Solve for x
    x = 128,440,739,906.16/415,857.20
  6. Step 6: Final answer
    x = 308,857.80

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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.