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Finding the Fourth Proportional to 218,904.80, 328,616.40 and 217,349.60

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Solution

The fourth proportional to 218,904.80, 328,616.40 and 217,349.60 is: 326,281.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,904.80 : 328,616.40 = 217,349.60 : x
  2. Step 2: Convert to fraction form
    218,904.80/328,616.40 = 217,349.60/x
  3. Step 3: Cross multiply
    218,904.80x = 328,616.40 × 217,349.60
  4. Step 4: Simplify right side
    218,904.80x = 71,424,643,093.44
  5. Step 5: Solve for x
    x = 71,424,643,093.44/218,904.80
  6. Step 6: Final answer
    x = 326,281.76

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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.