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Finding the Fourth Proportional to 285,204.30, 427,903.65 and 85,529.58

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Solution

The fourth proportional to 285,204.30, 427,903.65 and 85,529.58 is: 128,323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,204.30 : 427,903.65 = 85,529.58 : x
  2. Step 2: Convert to fraction form
    285,204.30/427,903.65 = 85,529.58/x
  3. Step 3: Cross multiply
    285,204.30x = 427,903.65 × 85,529.58
  4. Step 4: Simplify right side
    285,204.30x = 36,598,419,464.97
  5. Step 5: Solve for x
    x = 36,598,419,464.97/285,204.30
  6. Step 6: Final answer
    x = 128,323.52

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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.