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Finding the Fourth Proportional to 260,040.60, 390,060.90 and 220,771.80

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Solution

The fourth proportional to 260,040.60, 390,060.90 and 220,771.80 is: 331,157.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,040.60 : 390,060.90 = 220,771.80 : x
  2. Step 2: Convert to fraction form
    260,040.60/390,060.90 = 220,771.80/x
  3. Step 3: Cross multiply
    260,040.60x = 390,060.90 × 220,771.80
  4. Step 4: Simplify right side
    260,040.60x = 86,114,447,002.62
  5. Step 5: Solve for x
    x = 86,114,447,002.62/260,040.60
  6. Step 6: Final answer
    x = 331,157.70

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1.5x scale

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.