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Finding the Fourth Proportional to 262,892.16, 394,276.80 and 85,353.60

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Solution

The fourth proportional to 262,892.16, 394,276.80 and 85,353.60 is: 128,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,892.16 : 394,276.80 = 85,353.60 : x
  2. Step 2: Convert to fraction form
    262,892.16/394,276.80 = 85,353.60/x
  3. Step 3: Cross multiply
    262,892.16x = 394,276.80 × 85,353.60
  4. Step 4: Simplify right side
    262,892.16x = 33,652,944,276.48
  5. Step 5: Solve for x
    x = 33,652,944,276.48/262,892.16
  6. Step 6: Final answer
    x = 128,010.45

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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.