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Finding the Fourth Proportional to 427,807.20, 641,710.80 and 404,997.60

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Solution

The fourth proportional to 427,807.20, 641,710.80 and 404,997.60 is: 607,496.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,807.20 : 641,710.80 = 404,997.60 : x
  2. Step 2: Convert to fraction form
    427,807.20/641,710.80 = 404,997.60/x
  3. Step 3: Cross multiply
    427,807.20x = 641,710.80 × 404,997.60
  4. Step 4: Simplify right side
    427,807.20x = 259,891,333,894.08
  5. Step 5: Solve for x
    x = 259,891,333,894.08/427,807.20
  6. Step 6: Final answer
    x = 607,496.40

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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.