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Finding the Fourth Proportional to 576,090.40, 863,876.40 and 220,986.40

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Solution

The fourth proportional to 576,090.40, 863,876.40 and 220,986.40 is: 331,380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,090.40 : 863,876.40 = 220,986.40 : x
  2. Step 2: Convert to fraction form
    576,090.40/863,876.40 = 220,986.40/x
  3. Step 3: Cross multiply
    576,090.40x = 863,876.40 × 220,986.40
  4. Step 4: Simplify right side
    576,090.40x = 190,904,935,680.96
  5. Step 5: Solve for x
    x = 190,904,935,680.96/576,090.40
  6. Step 6: Final answer
    x = 331,380.17

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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.