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Finding the Fourth Proportional to 256,230.92, 384,306.95 and 85,455.63

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Solution

The fourth proportional to 256,230.92, 384,306.95 and 85,455.63 is: 128,170.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,230.92 : 384,306.95 = 85,455.63 : x
  2. Step 2: Convert to fraction form
    256,230.92/384,306.95 = 85,455.63/x
  3. Step 3: Cross multiply
    256,230.92x = 384,306.95 × 85,455.63
  4. Step 4: Simplify right side
    256,230.92x = 32,841,192,739.27
  5. Step 5: Solve for x
    x = 32,841,192,739.27/256,230.92
  6. Step 6: Final answer
    x = 128,170.29

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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.