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Finding the Fourth Proportional to 260,039.60, 390,059.40 and 220,770.80

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Solution

The fourth proportional to 260,039.60, 390,059.40 and 220,770.80 is: 331,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,039.60 : 390,059.40 = 220,770.80 : x
  2. Step 2: Convert to fraction form
    260,039.60/390,059.40 = 220,770.80/x
  3. Step 3: Cross multiply
    260,039.60x = 390,059.40 × 220,770.80
  4. Step 4: Simplify right side
    260,039.60x = 86,113,725,785.52
  5. Step 5: Solve for x
    x = 86,113,725,785.52/260,039.60
  6. Step 6: Final answer
    x = 331,156.20

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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.