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Finding the Fourth Proportional to 415,428.40, 621,830.40 and 326,198.80

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Solution

The fourth proportional to 415,428.40, 621,830.40 and 326,198.80 is: 488,267.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,428.40 : 621,830.40 = 326,198.80 : x
  2. Step 2: Convert to fraction form
    415,428.40/621,830.40 = 326,198.80/x
  3. Step 3: Cross multiply
    415,428.40x = 621,830.40 × 326,198.80
  4. Step 4: Simplify right side
    415,428.40x = 202,840,330,283.52
  5. Step 5: Solve for x
    x = 202,840,330,283.52/415,428.40
  6. Step 6: Final answer
    x = 488,267.85

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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.