Home / 428,743.08-643,114.62-148,107.24

Finding the Fourth Proportional to 428,743.08, 643,114.62 and 148,107.24

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Solution

The fourth proportional to 428,743.08, 643,114.62 and 148,107.24 is: 222,160.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,743.08 : 643,114.62 = 148,107.24 : x
  2. Step 2: Convert to fraction form
    428,743.08/643,114.62 = 148,107.24/x
  3. Step 3: Cross multiply
    428,743.08x = 643,114.62 × 148,107.24
  4. Step 4: Simplify right side
    428,743.08x = 95,249,931,371.85
  5. Step 5: Solve for x
    x = 95,249,931,371.85/428,743.08
  6. Step 6: Final answer
    x = 222,160.86

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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.