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Finding the Fourth Proportional to 260,331.20, 390,496.80 and 171,684.80

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Solution

The fourth proportional to 260,331.20, 390,496.80 and 171,684.80 is: 257,527.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,331.20 : 390,496.80 = 171,684.80 : x
  2. Step 2: Convert to fraction form
    260,331.20/390,496.80 = 171,684.80/x
  3. Step 3: Cross multiply
    260,331.20x = 390,496.80 × 171,684.80
  4. Step 4: Simplify right side
    260,331.20x = 67,042,365,008.64
  5. Step 5: Solve for x
    x = 67,042,365,008.64/260,331.20
  6. Step 6: Final answer
    x = 257,527.20

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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.