Home / 428,997.24-643,495.80-148,514.40

Finding the Fourth Proportional to 428,997.24, 643,495.80 and 148,514.40

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Solution

The fourth proportional to 428,997.24, 643,495.80 and 148,514.40 is: 222,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,997.24 : 643,495.80 = 148,514.40 : x
  2. Step 2: Convert to fraction form
    428,997.24/643,495.80 = 148,514.40/x
  3. Step 3: Cross multiply
    428,997.24x = 643,495.80 × 148,514.40
  4. Step 4: Simplify right side
    428,997.24x = 95,568,392,639.52
  5. Step 5: Solve for x
    x = 95,568,392,639.52/428,997.24
  6. Step 6: Final answer
    x = 222,771.58

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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.