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Finding the Fourth Proportional to 285,067.36, 427,480.60 and 85,416.04

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Solution

The fourth proportional to 285,067.36, 427,480.60 and 85,416.04 is: 128,087.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,067.36 : 427,480.60 = 85,416.04 : x
  2. Step 2: Convert to fraction form
    285,067.36/427,480.60 = 85,416.04/x
  3. Step 3: Cross multiply
    285,067.36x = 427,480.60 × 85,416.04
  4. Step 4: Simplify right side
    285,067.36x = 36,513,700,028.82
  5. Step 5: Solve for x
    x = 36,513,700,028.82/285,067.36
  6. Step 6: Final answer
    x = 128,087.97

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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.