Home / 428,848.60-643,272.90-148,336.60

Finding the Fourth Proportional to 428,848.60, 643,272.90 and 148,336.60

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Solution

The fourth proportional to 428,848.60, 643,272.90 and 148,336.60 is: 222,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,848.60 : 643,272.90 = 148,336.60 : x
  2. Step 2: Convert to fraction form
    428,848.60/643,272.90 = 148,336.60/x
  3. Step 3: Cross multiply
    428,848.60x = 643,272.90 × 148,336.60
  4. Step 4: Simplify right side
    428,848.60x = 95,420,914,858.14
  5. Step 5: Solve for x
    x = 95,420,914,858.14/428,848.60
  6. Step 6: Final answer
    x = 222,504.90

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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.