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Finding the Fourth Proportional to 218,901.80, 328,611.90 and 217,346.60

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Solution

The fourth proportional to 218,901.80, 328,611.90 and 217,346.60 is: 326,277.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,901.80 : 328,611.90 = 217,346.60 : x
  2. Step 2: Convert to fraction form
    218,901.80/328,611.90 = 217,346.60/x
  3. Step 3: Cross multiply
    218,901.80x = 328,611.90 × 217,346.60
  4. Step 4: Simplify right side
    218,901.80x = 71,422,679,184.54
  5. Step 5: Solve for x
    x = 71,422,679,184.54/218,901.80
  6. Step 6: Final answer
    x = 326,277.26

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1.5x scale

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.