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Finding the Fourth Proportional to 354,631.40, 532,335.90 and 221,661.80

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Solution

The fourth proportional to 354,631.40, 532,335.90 and 221,661.80 is: 332,735.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,631.40 : 532,335.90 = 221,661.80 : x
  2. Step 2: Convert to fraction form
    354,631.40/532,335.90 = 221,661.80/x
  3. Step 3: Cross multiply
    354,631.40x = 532,335.90 × 221,661.80
  4. Step 4: Simplify right side
    354,631.40x = 117,998,533,798.62
  5. Step 5: Solve for x
    x = 117,998,533,798.62/354,631.40
  6. Step 6: Final answer
    x = 332,735.72

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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.