Home / 428,918.60-643,533.90-148,464.20

Finding the Fourth Proportional to 428,918.60, 643,533.90 and 148,464.20

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Solution

The fourth proportional to 428,918.60, 643,533.90 and 148,464.20 is: 222,750.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,918.60 : 643,533.90 = 148,464.20 : x
  2. Step 2: Convert to fraction form
    428,918.60/643,533.90 = 148,464.20/x
  3. Step 3: Cross multiply
    428,918.60x = 643,533.90 × 148,464.20
  4. Step 4: Simplify right side
    428,918.60x = 95,541,745,636.38
  5. Step 5: Solve for x
    x = 95,541,745,636.38/428,918.60
  6. Step 6: Final answer
    x = 222,750.30

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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.