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Finding the Fourth Proportional to 285,513.80, 428,169.90 and 98,481.80

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Solution

The fourth proportional to 285,513.80, 428,169.90 and 98,481.80 is: 147,687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,513.80 : 428,169.90 = 98,481.80 : x
  2. Step 2: Convert to fraction form
    285,513.80/428,169.90 = 98,481.80/x
  3. Step 3: Cross multiply
    285,513.80x = 428,169.90 × 98,481.80
  4. Step 4: Simplify right side
    285,513.80x = 42,166,942,457.82
  5. Step 5: Solve for x
    x = 42,166,942,457.82/285,513.80
  6. Step 6: Final answer
    x = 147,687.93

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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.