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Finding the Fourth Proportional to 218,966.60, 328,061.10 and 204,969.80

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Solution

The fourth proportional to 218,966.60, 328,061.10 and 204,969.80 is: 307,090.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,966.60 : 328,061.10 = 204,969.80 : x
  2. Step 2: Convert to fraction form
    218,966.60/328,061.10 = 204,969.80/x
  3. Step 3: Cross multiply
    218,966.60x = 328,061.10 × 204,969.80
  4. Step 4: Simplify right side
    218,966.60x = 67,242,618,054.78
  5. Step 5: Solve for x
    x = 67,242,618,054.78/218,966.60
  6. Step 6: Final answer
    x = 307,090.75

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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.