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Finding the Fourth Proportional to 331,690.20, 496,988.10 and 191,203.80

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Solution

The fourth proportional to 331,690.20, 496,988.10 and 191,203.80 is: 286,490.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,690.20 : 496,988.10 = 191,203.80 : x
  2. Step 2: Convert to fraction form
    331,690.20/496,988.10 = 191,203.80/x
  3. Step 3: Cross multiply
    331,690.20x = 496,988.10 × 191,203.80
  4. Step 4: Simplify right side
    331,690.20x = 95,026,013,274.78
  5. Step 5: Solve for x
    x = 95,026,013,274.78/331,690.20
  6. Step 6: Final answer
    x = 286,490.26

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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.