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Finding the Fourth Proportional to 663,976.80, 994,777.20 and 403,840.80

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Solution

The fourth proportional to 663,976.80, 994,777.20 and 403,840.80 is: 605,038.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,976.80 : 994,777.20 = 403,840.80 : x
  2. Step 2: Convert to fraction form
    663,976.80/994,777.20 = 403,840.80/x
  3. Step 3: Cross multiply
    663,976.80x = 994,777.20 × 403,840.80
  4. Step 4: Simplify right side
    663,976.80x = 401,731,620,269.76
  5. Step 5: Solve for x
    x = 401,731,620,269.76/663,976.80
  6. Step 6: Final answer
    x = 605,038.64

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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.