Home / 428,778.60-643,265.04-148,298.28

Finding the Fourth Proportional to 428,778.60, 643,265.04 and 148,298.28

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Solution

The fourth proportional to 428,778.60, 643,265.04 and 148,298.28 is: 222,481.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,778.60 : 643,265.04 = 148,298.28 : x
  2. Step 2: Convert to fraction form
    428,778.60/643,265.04 = 148,298.28/x
  3. Step 3: Cross multiply
    428,778.60x = 643,265.04 × 148,298.28
  4. Step 4: Simplify right side
    428,778.60x = 95,395,099,016.13
  5. Step 5: Solve for x
    x = 95,395,099,016.13/428,778.60
  6. Step 6: Final answer
    x = 222,481.02

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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.