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Finding the Fourth Proportional to 419,753.40, 629,630.10 and 403,423.80

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Solution

The fourth proportional to 419,753.40, 629,630.10 and 403,423.80 is: 605,135.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,753.40 : 629,630.10 = 403,423.80 : x
  2. Step 2: Convert to fraction form
    419,753.40/629,630.10 = 403,423.80/x
  3. Step 3: Cross multiply
    419,753.40x = 629,630.10 × 403,423.80
  4. Step 4: Simplify right side
    419,753.40x = 254,007,767,536.38
  5. Step 5: Solve for x
    x = 254,007,767,536.38/419,753.40
  6. Step 6: Final answer
    x = 605,135.70

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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.