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Finding the Fourth Proportional to 576,835.80, 865,404.90 and 221,861.40

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Solution

The fourth proportional to 576,835.80, 865,404.90 and 221,861.40 is: 332,850.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,835.80 : 865,404.90 = 221,861.40 : x
  2. Step 2: Convert to fraction form
    576,835.80/865,404.90 = 221,861.40/x
  3. Step 3: Cross multiply
    576,835.80x = 865,404.90 × 221,861.40
  4. Step 4: Simplify right side
    576,835.80x = 191,999,942,680.86
  5. Step 5: Solve for x
    x = 191,999,942,680.86/576,835.80
  6. Step 6: Final answer
    x = 332,850.25

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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.