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Finding the Fourth Proportional to 354,821.40, 532,620.90 and 221,851.80

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Solution

The fourth proportional to 354,821.40, 532,620.90 and 221,851.80 is: 333,020.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,821.40 : 532,620.90 = 221,851.80 : x
  2. Step 2: Convert to fraction form
    354,821.40/532,620.90 = 221,851.80/x
  3. Step 3: Cross multiply
    354,821.40x = 532,620.90 × 221,851.80
  4. Step 4: Simplify right side
    354,821.40x = 118,162,905,382.62
  5. Step 5: Solve for x
    x = 118,162,905,382.62/354,821.40
  6. Step 6: Final answer
    x = 333,020.80

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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.