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Finding the Fourth Proportional to 285,424.65, 428,100.06 and 135,760.05

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Solution

The fourth proportional to 285,424.65, 428,100.06 and 135,760.05 is: 203,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,424.65 : 428,100.06 = 135,760.05 : x
  2. Step 2: Convert to fraction form
    285,424.65/428,100.06 = 135,760.05/x
  3. Step 3: Cross multiply
    285,424.65x = 428,100.06 × 135,760.05
  4. Step 4: Simplify right side
    285,424.65x = 58,118,885,550.60
  5. Step 5: Solve for x
    x = 58,118,885,550.60/285,424.65
  6. Step 6: Final answer
    x = 203,622.52

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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.