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Finding the Fourth Proportional to 307,892.90, 430,000.30 and 307,892.90

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Solution

The fourth proportional to 307,892.90, 430,000.30 and 307,892.90 is: 430,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,892.90 : 430,000.30 = 307,892.90 : x
  2. Step 2: Convert to fraction form
    307,892.90/430,000.30 = 307,892.90/x
  3. Step 3: Cross multiply
    307,892.90x = 430,000.30 × 307,892.90
  4. Step 4: Simplify right side
    307,892.90x = 132,394,039,367.87
  5. Step 5: Solve for x
    x = 132,394,039,367.87/307,892.90
  6. Step 6: Final answer
    x = 430,000.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.