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Finding the Fourth Proportional to 289,615.80, 433,905.30 and 248,143.80

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Solution

The fourth proportional to 289,615.80, 433,905.30 and 248,143.80 is: 371,771.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,615.80 : 433,905.30 = 248,143.80 : x
  2. Step 2: Convert to fraction form
    289,615.80/433,905.30 = 248,143.80/x
  3. Step 3: Cross multiply
    289,615.80x = 433,905.30 × 248,143.80
  4. Step 4: Simplify right side
    289,615.80x = 107,670,909,982.14
  5. Step 5: Solve for x
    x = 107,670,909,982.14/289,615.80
  6. Step 6: Final answer
    x = 371,771.53

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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.