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Finding the Fourth Proportional to 285,489.96, 428,256.18 and 85,794.36

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Solution

The fourth proportional to 285,489.96, 428,256.18 and 85,794.36 is: 128,697.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,489.96 : 428,256.18 = 85,794.36 : x
  2. Step 2: Convert to fraction form
    285,489.96/428,256.18 = 85,794.36/x
  3. Step 3: Cross multiply
    285,489.96x = 428,256.18 × 85,794.36
  4. Step 4: Simplify right side
    285,489.96x = 36,741,964,879.14
  5. Step 5: Solve for x
    x = 36,741,964,879.14/285,489.96
  6. Step 6: Final answer
    x = 128,697.92

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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.