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Finding the Fourth Proportional to 325,969.20, 488,953.80 and 211,807.80

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Solution

The fourth proportional to 325,969.20, 488,953.80 and 211,807.80 is: 317,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,969.20 : 488,953.80 = 211,807.80 : x
  2. Step 2: Convert to fraction form
    325,969.20/488,953.80 = 211,807.80/x
  3. Step 3: Cross multiply
    325,969.20x = 488,953.80 × 211,807.80
  4. Step 4: Simplify right side
    325,969.20x = 103,564,228,679.64
  5. Step 5: Solve for x
    x = 103,564,228,679.64/325,969.20
  6. Step 6: Final answer
    x = 317,711.70

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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.