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Finding the Fourth Proportional to 427,808.70, 641,713.05 and 404,999.10

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Solution

The fourth proportional to 427,808.70, 641,713.05 and 404,999.10 is: 607,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,808.70 : 641,713.05 = 404,999.10 : x
  2. Step 2: Convert to fraction form
    427,808.70/641,713.05 = 404,999.10/x
  3. Step 3: Cross multiply
    427,808.70x = 641,713.05 × 404,999.10
  4. Step 4: Simplify right side
    427,808.70x = 259,893,207,708.26
  5. Step 5: Solve for x
    x = 259,893,207,708.26/427,808.70
  6. Step 6: Final answer
    x = 607,498.65

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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.