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Finding the Fourth Proportional to 663,995.80, 994,805.70 and 403,859.80

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Solution

The fourth proportional to 663,995.80, 994,805.70 and 403,859.80 is: 605,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,995.80 : 994,805.70 = 403,859.80 : x
  2. Step 2: Convert to fraction form
    663,995.80/994,805.70 = 403,859.80/x
  3. Step 3: Cross multiply
    663,995.80x = 994,805.70 × 403,859.80
  4. Step 4: Simplify right side
    663,995.80x = 401,762,031,040.86
  5. Step 5: Solve for x
    x = 401,762,031,040.86/663,995.80
  6. Step 6: Final answer
    x = 605,067.13

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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.