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Finding the Fourth Proportional to 285,468.80, 428,203.20 and 191,465.60

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Solution

The fourth proportional to 285,468.80, 428,203.20 and 191,465.60 is: 287,198.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,468.80 : 428,203.20 = 191,465.60 : x
  2. Step 2: Convert to fraction form
    285,468.80/428,203.20 = 191,465.60/x
  3. Step 3: Cross multiply
    285,468.80x = 428,203.20 × 191,465.60
  4. Step 4: Simplify right side
    285,468.80x = 81,986,182,609.92
  5. Step 5: Solve for x
    x = 81,986,182,609.92/285,468.80
  6. Step 6: Final answer
    x = 287,198.40

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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.