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Finding the Fourth Proportional to 640,855.40, 960,246.30 and 403,773.80

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Solution

The fourth proportional to 640,855.40, 960,246.30 and 403,773.80 is: 605,007.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,855.40 : 960,246.30 = 403,773.80 : x
  2. Step 2: Convert to fraction form
    640,855.40/960,246.30 = 403,773.80/x
  3. Step 3: Cross multiply
    640,855.40x = 960,246.30 × 403,773.80
  4. Step 4: Simplify right side
    640,855.40x = 387,722,297,486.94
  5. Step 5: Solve for x
    x = 387,722,297,486.94/640,855.40
  6. Step 6: Final answer
    x = 605,007.46

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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.