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Finding the Fourth Proportional to 576,139.40, 863,949.90 and 221,035.40

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Solution

The fourth proportional to 576,139.40, 863,949.90 and 221,035.40 is: 331,453.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,139.40 : 863,949.90 = 221,035.40 : x
  2. Step 2: Convert to fraction form
    576,139.40/863,949.90 = 221,035.40/x
  3. Step 3: Cross multiply
    576,139.40x = 863,949.90 × 221,035.40
  4. Step 4: Simplify right side
    576,139.40x = 190,963,511,726.46
  5. Step 5: Solve for x
    x = 190,963,511,726.46/576,139.40
  6. Step 6: Final answer
    x = 331,453.66

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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.