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Finding the Fourth Proportional to 285,457.20, 428,056.20 and 107,905.20

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Solution

The fourth proportional to 285,457.20, 428,056.20 and 107,905.20 is: 161,808.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,457.20 : 428,056.20 = 107,905.20 : x
  2. Step 2: Convert to fraction form
    285,457.20/428,056.20 = 107,905.20/x
  3. Step 3: Cross multiply
    285,457.20x = 428,056.20 × 107,905.20
  4. Step 4: Simplify right side
    285,457.20x = 46,189,489,872.24
  5. Step 5: Solve for x
    x = 46,189,489,872.24/285,457.20
  6. Step 6: Final answer
    x = 161,808.81

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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.