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Finding the Fourth Proportional to 663,996.80, 994,807.20 and 403,860.80

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Solution

The fourth proportional to 663,996.80, 994,807.20 and 403,860.80 is: 605,068.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,996.80 : 994,807.20 = 403,860.80 : x
  2. Step 2: Convert to fraction form
    663,996.80/994,807.20 = 403,860.80/x
  3. Step 3: Cross multiply
    663,996.80x = 994,807.20 × 403,860.80
  4. Step 4: Simplify right side
    663,996.80x = 401,763,631,637.76
  5. Step 5: Solve for x
    x = 401,763,631,637.76/663,996.80
  6. Step 6: Final answer
    x = 605,068.63

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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.