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Finding the Fourth Proportional to 285,620.80, 428,431.20 and 108,133.60

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Solution

The fourth proportional to 285,620.80, 428,431.20 and 108,133.60 is: 162,200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,620.80 : 428,431.20 = 108,133.60 : x
  2. Step 2: Convert to fraction form
    285,620.80/428,431.20 = 108,133.60/x
  3. Step 3: Cross multiply
    285,620.80x = 428,431.20 × 108,133.60
  4. Step 4: Simplify right side
    285,620.80x = 46,327,808,008.32
  5. Step 5: Solve for x
    x = 46,327,808,008.32/285,620.80
  6. Step 6: Final answer
    x = 162,200.40

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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.