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Finding the Fourth Proportional to 442,455.40, 664,028.70 and 205,827.40

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Solution

The fourth proportional to 442,455.40, 664,028.70 and 205,827.40 is: 308,901.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,455.40 : 664,028.70 = 205,827.40 : x
  2. Step 2: Convert to fraction form
    442,455.40/664,028.70 = 205,827.40/x
  3. Step 3: Cross multiply
    442,455.40x = 664,028.70 × 205,827.40
  4. Step 4: Simplify right side
    442,455.40x = 136,675,300,846.38
  5. Step 5: Solve for x
    x = 136,675,300,846.38/442,455.40
  6. Step 6: Final answer
    x = 308,901.87

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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.