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Finding the Fourth Proportional to 218,811.80, 328,217.70 and 186,152.60

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Solution

The fourth proportional to 218,811.80, 328,217.70 and 186,152.60 is: 279,228.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,811.80 : 328,217.70 = 186,152.60 : x
  2. Step 2: Convert to fraction form
    218,811.80/328,217.70 = 186,152.60/x
  3. Step 3: Cross multiply
    218,811.80x = 328,217.70 × 186,152.60
  4. Step 4: Simplify right side
    218,811.80x = 61,098,578,221.02
  5. Step 5: Solve for x
    x = 61,098,578,221.02/218,811.80
  6. Step 6: Final answer
    x = 279,228.90

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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.