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Finding the Fourth Proportional to 547,374.60, 821,676.30 and 423,265.80

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Solution

The fourth proportional to 547,374.60, 821,676.30 and 423,265.80 is: 635,373.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,374.60 : 821,676.30 = 423,265.80 : x
  2. Step 2: Convert to fraction form
    547,374.60/821,676.30 = 423,265.80/x
  3. Step 3: Cross multiply
    547,374.60x = 821,676.30 × 423,265.80
  4. Step 4: Simplify right side
    547,374.60x = 347,787,476,460.54
  5. Step 5: Solve for x
    x = 347,787,476,460.54/547,374.60
  6. Step 6: Final answer
    x = 635,373.79

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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.