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Finding the Fourth Proportional to 259,432.80, 389,149.20 and 148,533.60

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Solution

The fourth proportional to 259,432.80, 389,149.20 and 148,533.60 is: 222,800.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,432.80 : 389,149.20 = 148,533.60 : x
  2. Step 2: Convert to fraction form
    259,432.80/389,149.20 = 148,533.60/x
  3. Step 3: Cross multiply
    259,432.80x = 389,149.20 × 148,533.60
  4. Step 4: Simplify right side
    259,432.80x = 57,801,731,613.12
  5. Step 5: Solve for x
    x = 57,801,731,613.12/259,432.80
  6. Step 6: Final answer
    x = 222,800.40

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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.