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Finding the Fourth Proportional to 260,523.80, 389,619.30 and 218,533.40

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Solution

The fourth proportional to 260,523.80, 389,619.30 and 218,533.40 is: 326,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,523.80 : 389,619.30 = 218,533.40 : x
  2. Step 2: Convert to fraction form
    260,523.80/389,619.30 = 218,533.40/x
  3. Step 3: Cross multiply
    260,523.80x = 389,619.30 × 218,533.40
  4. Step 4: Simplify right side
    260,523.80x = 85,144,830,334.62
  5. Step 5: Solve for x
    x = 85,144,830,334.62/260,523.80
  6. Step 6: Final answer
    x = 326,821.70

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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.