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Finding the Fourth Proportional to 389,997.71, 584,567.21 and 255,006.11

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Solution

The fourth proportional to 389,997.71, 584,567.21 and 255,006.11 is: 382,228.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,997.71 : 584,567.21 = 255,006.11 : x
  2. Step 2: Convert to fraction form
    389,997.71/584,567.21 = 255,006.11/x
  3. Step 3: Cross multiply
    389,997.71x = 584,567.21 × 255,006.11
  4. Step 4: Simplify right side
    389,997.71x = 149,068,212,354.59
  5. Step 5: Solve for x
    x = 149,068,212,354.59/389,997.71
  6. Step 6: Final answer
    x = 382,228.43

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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.