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Finding the Fourth Proportional to 266,363.40, 399,107.70 and 221,748.60

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Solution

The fourth proportional to 266,363.40, 399,107.70 and 221,748.60 is: 332,258.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,363.40 : 399,107.70 = 221,748.60 : x
  2. Step 2: Convert to fraction form
    266,363.40/399,107.70 = 221,748.60/x
  3. Step 3: Cross multiply
    266,363.40x = 399,107.70 × 221,748.60
  4. Step 4: Simplify right side
    266,363.40x = 88,501,573,724.22
  5. Step 5: Solve for x
    x = 88,501,573,724.22/266,363.40
  6. Step 6: Final answer
    x = 332,258.76

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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.