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Finding the Fourth Proportional to 612,958.70, 919,000.65 and 275,723.30

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Solution

The fourth proportional to 612,958.70, 919,000.65 and 275,723.30 is: 413,388.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,958.70 : 919,000.65 = 275,723.30 : x
  2. Step 2: Convert to fraction form
    612,958.70/919,000.65 = 275,723.30/x
  3. Step 3: Cross multiply
    612,958.70x = 919,000.65 × 275,723.30
  4. Step 4: Simplify right side
    612,958.70x = 253,389,891,920.15
  5. Step 5: Solve for x
    x = 253,389,891,920.15/612,958.70
  6. Step 6: Final answer
    x = 413,388.20

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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.