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Finding the Fourth Proportional to 218,764.80, 328,147.20 and 166,276.80

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Solution

The fourth proportional to 218,764.80, 328,147.20 and 166,276.80 is: 249,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,764.80 : 328,147.20 = 166,276.80 : x
  2. Step 2: Convert to fraction form
    218,764.80/328,147.20 = 166,276.80/x
  3. Step 3: Cross multiply
    218,764.80x = 328,147.20 × 166,276.80
  4. Step 4: Simplify right side
    218,764.80x = 54,563,266,344.96
  5. Step 5: Solve for x
    x = 54,563,266,344.96/218,764.80
  6. Step 6: Final answer
    x = 249,415.20

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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.