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Finding the Fourth Proportional to 663,919.80, 994,691.70 and 403,783.80

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Solution

The fourth proportional to 663,919.80, 994,691.70 and 403,783.80 is: 604,953.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,919.80 : 994,691.70 = 403,783.80 : x
  2. Step 2: Convert to fraction form
    663,919.80/994,691.70 = 403,783.80/x
  3. Step 3: Cross multiply
    663,919.80x = 994,691.70 × 403,783.80
  4. Step 4: Simplify right side
    663,919.80x = 401,640,394,454.46
  5. Step 5: Solve for x
    x = 401,640,394,454.46/663,919.80
  6. Step 6: Final answer
    x = 604,953.18

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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.