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Finding the Fourth Proportional to 285,940.33, 428,913.57 and 86,262.45

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Solution

The fourth proportional to 285,940.33, 428,913.57 and 86,262.45 is: 129,394.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,940.33 : 428,913.57 = 86,262.45 : x
  2. Step 2: Convert to fraction form
    285,940.33/428,913.57 = 86,262.45/x
  3. Step 3: Cross multiply
    285,940.33x = 428,913.57 × 86,262.45
  4. Step 4: Simplify right side
    285,940.33x = 36,999,134,101.50
  5. Step 5: Solve for x
    x = 36,999,134,101.50/285,940.33
  6. Step 6: Final answer
    x = 129,394.60

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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.