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Finding the Fourth Proportional to 663,942.80, 994,726.20 and 403,806.80

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Solution

The fourth proportional to 663,942.80, 994,726.20 and 403,806.80 is: 604,987.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,942.80 : 994,726.20 = 403,806.80 : x
  2. Step 2: Convert to fraction form
    663,942.80/994,726.20 = 403,806.80/x
  3. Step 3: Cross multiply
    663,942.80x = 994,726.20 × 403,806.80
  4. Step 4: Simplify right side
    663,942.80x = 401,677,203,698.16
  5. Step 5: Solve for x
    x = 401,677,203,698.16/663,942.80
  6. Step 6: Final answer
    x = 604,987.66

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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.