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Finding the Fourth Proportional to 218,990.39, 328,485.58 and 52,778.39

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Solution

The fourth proportional to 218,990.39, 328,485.58 and 52,778.39 is: 79,167.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,990.39 : 328,485.58 = 52,778.39 : x
  2. Step 2: Convert to fraction form
    218,990.39/328,485.58 = 52,778.39/x
  3. Step 3: Cross multiply
    218,990.39x = 328,485.58 × 52,778.39
  4. Step 4: Simplify right side
    218,990.39x = 17,336,938,276.24
  5. Step 5: Solve for x
    x = 17,336,938,276.24/218,990.39
  6. Step 6: Final answer
    x = 79,167.58

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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.